Heavy personnel packages kept appearing on the Lumen Field turf, and Mike Macdonald refused to take the bait. On January 25, 2026, with the NFC championship at stake, Sean McVay sent multiple tight ends into the formation and challenged Seattle to answer with bigger bodies. Macdonald didn’t blink.
The Seahawks kept five defensive backs on the field, trusting their nickel defense against formations designed to punish smaller defenders. In his February 2026 Super Bowl preview, ESPN analyst Bill Barnwell documented the standoff: Seattle stayed in nickel on 36 of 40 plays against the Rams’ two- and three-tight-end groupings.
In that moment, the NFL’s evolving personnel war became impossible to ignore. McVay wanted to create running lanes or force linebackers into coverage. Macdonald preferred to absorb the physical punishment rather than surrender speed. The Rams still moved the football. Seattle still won, 31-27. That contradiction cuts to the heart of modern defensive football. Heavy formations can generate offense without forcing a coordinator to change personnel. The real advantage comes when an offense makes staying in nickel just as dangerous as switching to base.
The NFL’s Return to Heavy Football Has Changed the Numbers
For much of the previous decade, offensive coordinators chased speed. Three-receiver sets spread defenders across the field, while quarterbacks hunted linebackers trapped in coverage against slot receivers and athletic tight ends. Defenses responded by getting smaller. Nickel became the NFL’s practical base defense, even if coaching terminology never completely caught up. Teams invested in hybrid safeties, lighter linebackers, and defensive backs who could tackle near the line of scrimmage. However, that transformation created an opening for offenses willing to bring back size.
According to James Reber’s February 2026 analysis for NFL Next Gen Stats, defenses matched 11 personnel with five or more defensive backs on 95.6% of snaps in 2025. The same report revealed how sharply offensive formations had changed. Teams deployed packages featuring fewer than three wide receivers on 41.7% of plays, their highest rate since Next Gen Stats began tracking personnel in 2016. Those heavier looks helped push traditional base-defense usage to 29.7%, up from 20.5% in 2023. Offenses had found a weakness worth testing.
Why Nickel Became Such an Attractive Target
Consider what happens when an offense replaces its third receiver with another 250-pound tight end. The defense suddenly faces six potential blockers near the tackle box. If it keeps a smaller nickel defender on the field, that player may need to defeat a tight end’s block or fill a rushing lane against a pulling guard. A 190-pound defensive back can make that tackle. Doing it repeatedly against downhill runs presents a different challenge.
In that moment, the offense wants to turn a coverage specialist into a reluctant run defender. However, swapping the nickel corner for a third linebacker introduces another vulnerability. A linebacker might handle inside zone and duo more comfortably, but chasing a tight end up the seam requires different skills. Heavy personnel packages create genuine leverage only when both threats remain credible. The running game must punish light boxes. Meanwhile, the passing game must exploit the coverage limitations of heavier defensive personnel. Without that combination, coordinators can sit comfortably in their preferred grouping.
When Heavy Personnel Actually Forces Defenses Into Base
The number of tight ends matters less than what those players can accomplish after the snap. An offense that merely crowds the formation gives defensive coordinators time to tighten their fronts and maintain favorable coverage matchups. On the other hand, a unit that consistently moves defenders off the ball demands a more serious response.
The Run Game Must Win the B-Gap
Picture a defense protecting its nickel corner behind a four-man front. The offense aligns two tight ends beside the right tackle and calls duo. Its interior linemen drive into the defensive tackles while the running back reads the linebacker’s movement. If the defensive front holds its ground, the runner meets contact near the line. But when the double teams displace a defensive tackle, the linebacker must step downhill. That creates space for the back to cut through the B-gap.
Before long, the nickel defender faces a choice between attacking a blocker and surrendering extra rushing yards. That sequence explains when heavy personnel packages start forcing defensive substitutions. A defense changes personnel when its existing run fits repeatedly fail, not simply because another tight end enters the huddle. The problem intensifies against power and counter concepts. Pulling guards can attack the edge while tight ends seal defenders inside, creating unfavorable collisions for smaller defensive backs. Yet still, offenses must execute those blocks. A 260-pound tight end who whiffs against an edge defender accomplishes nothing.
Play-Action Turns Bigger Linebackers Into Targets
The next problem arrives once the defense commits more size. The quarterback rides the mesh point while his offensive line fires off low. A tight end briefly sells the block before releasing into the seam. Suddenly, a linebacker who stepped toward the line must reverse direction. Against Cover 3, the offense can attack the hook defenders with crossing routes and seam concepts. Against man coverage, a tight end may have the advantage against a slower linebacker.
Despite the pressure, disciplined defenses can survive these situations. Strong linebackers maintain their run-pass keys without abandoning coverage responsibilities. The offense therefore needs more than a convincing fake. It needs route combinations that exploit the particular defender who reacts. That relationship between downhill rushing and play-action makes heavy personnel packages particularly dangerous.
Sean McVay Exposed San Francisco’s Linebacker Problem
The Rams offered a brutal demonstration against San Francisco on November 9, 2025. Los Angeles won 42-26, with McVay repeatedly attacking a defense missing its most important linebacker. Fred Warner’s absence weakened San Francisco’s second-level coverage, while other injuries complicated the defensive rotation. McVay recognized the opportunity. According to the Rams’ November 10 team report, 5 Interesting Stats From the Offensive Explosion in Win Over 49ers, Los Angeles used 13 personnel on 30 of 67 offensive plays.
That represented 44.8% of its snaps. The Rams averaged 6.7 yards per play from the grouping, scored four touchdowns, and recorded a 63.3% success rate, according to Next Gen Stats figures published in the report. Those numbers captured the scale of the damage. The real punishment came from how McVay attacked San Francisco’s linebackers.
The Third Linebacker Became the Weak Link
McVay didn’t build the offense around a predictable sequence of power runs. Instead, he used San Francisco’s respect for those runs to create passing opportunities. In his November 13 Football Film Room analysis, How Sean McVay Took Advantage of the 49ers’ Weakness, Nick Kehoe highlighted the Rams’ aggressive play-action approach. Los Angeles used play-action on 51.4% of its dropbacks in the matchup. That frequency forced defenders to process run action repeatedly before reacting to developing routes.
Linebackers Tatum Bethune and Luke Gifford faced responsibilities that became more demanding without Warner directing the middle of the defense. A linebacker who stepped downhill risked opening a throwing lane behind him. Someone who hesitated against the run could surrender favorable blocking angles. McVay’s heavy formations made both choices uncomfortable. Meanwhile, Matthew Stafford had enough receiving talent to punish coverage mistakes without abandoning the extra tight ends.
The offense didn’t need every play to become a bruising rushing attempt. It needed San Francisco to believe that possibility existed. Against the 49ers, heavy personnel packages helped create exactly the defensive uncertainty McVay wanted. However, the same philosophy encountered a much different opponent when the Rams traveled to Seattle for the NFC title.
Mike Macdonald Turned Nickel Into Seattle’s Base Defense
Seattle’s response to heavy personnel began with roster construction. Macdonald didn’t need to replace his fifth defensive back because he had defenders capable of handling responsibilities traditionally assigned to linebackers. The clearest example was Nick Emmanwori. At 6-foot-3 and 220 pounds, the rookie safety possessed the size to attack rushing lanes and the athleticism to carry receivers through the intermediate portions of the field. His presence changed Seattle’s defensive arithmetic.
Instead of choosing between run support and coverage speed, Macdonald could deploy Emmanwori as a hybrid defender and maintain his preferred secondary personnel. According to Reber’s Next Gen Stats study, Seattle stayed in nickel against offensive groupings with fewer than three wide receivers on 77.8% of snaps in 2025. No other NFL defense exceeded 60.5%. The Seahawks allowed just 4.5 yards per play while using that approach. Seattle wasn’t merely tolerating heavy formations. Its defense had enough physical talent to challenge them without conventional substitutions.
Nick Emmanwori Made the Light Box More Dangerous
The usual criticism of nickel defense centers on physicality. An extra defensive back theoretically gives the offense a size advantage near the line. Yet Seattle’s front reduced the frequency of those unfavorable matchups. Defensive linemen could occupy double teams while linebackers maintained their run-fit discipline. Emmanwori then attacked rushing lanes from the second level or adjusted into coverage depending on the call. In that moment, his responsibilities resembled those of two different positions.
He could trigger downhill toward the B-gap and still offer meaningful coverage range against tight ends. The approach didn’t eliminate every rushing advantage. However, it allowed Seattle to confront heavy formations without consistently sacrificing a coverage defender. That versatility became particularly valuable against McVay.
The NFC Championship Proved Why Personnel Victories Aren’t Everything
The Rams entered the January 25 championship game with a clear tactical opportunity. Their multiple-tight-end formations could challenge Seattle’s nickel defense with extra blockers. Alternatively, they could coax Macdonald into adding another linebacker and create passing mismatches. Seattle refused the second option. Barnwell’s ESPN breakdown showed that the Seahawks stayed in nickel for 90% of the snaps they faced against Los Angeles’ 12 and 13 personnel. Yet the Rams still enjoyed considerable success from those groupings, averaging nearly 10 yards per play with a 55% success rate, according to his analysis.
That performance complicates any claim that Macdonald simply erased McVay’s heavy-personnel attack. Stafford finished with 374 passing yards and three touchdowns, according to the official championship-game statistics. Nevertheless, Seattle won 31-27 and advanced to Super Bowl LX. The lesson isn’t that nickel automatically defeats bigger offensive packages. Rather, a defense can surrender production without conceding control of its personnel decisions.
Macdonald preserved his coverage flexibility throughout the matchup. The Rams generated explosive offense, but they couldn’t consistently force Seattle into the linebacker-heavy looks that would have created different matchups. Gaining yards is one achievement. Making a coordinator abandon his preferred defensive structure requires another.
New England Offered a Different Answer to the Same Problem
The Patriots approached the NFL’s heavy-personnel shift from both sides of the football. On defense, New England embraced bigger bodies without relying exclusively on conventional linebacker-heavy fronts. Its base defense frequently featured three substantial defensive tackles, allowing the Patriots to strengthen the interior without giving up their preferred coverage responsibilities. According to Next Gen Stats, New England’s base unit held opponents to 4.1 yards per play in 2025, the fifth-best figure among NFL base defenses.
On offense, Josh McDaniels used extra blockers to create a physical advantage. The Patriots deployed six offensive linemen, or five alongside defensive tackle Khyiris Tonga, on 87 plays from Weeks 10 through 18. They had used those looks only six times during the opening nine weeks. The timing coincided with a dramatic improvement in rushing efficiency.
The Patriots’ Jumbo Shift Came With Important Qualifications
New England’s running backs averaged 3.8 yards per carry through Week 9. From Week 10 onward, that number climbed to 5.5 yards, leading the NFL over that span, per Next Gen Stats. But attributing the entire increase to extra blockers would oversimplify the improvement. The individual matchups tell a more complicated story. Against Tampa Bay on November 9, rookie TreVeyon Henderson ran for 147 yards on 14 carries. Two explosive touchdowns, covering 55 and 69 yards, drove much of that production.
Weeks later, Henderson produced another pair of long scoring runs against Buffalo on December 14. New England rushed for 246 yards on 25 attempts in that game, according to the Patriots’ official game notes. Finally, the Week 18 victory over Miami delivered another substantial rushing performance. The Patriots gained 243 yards on the ground, with Rhamondre Stevenson contributing 131 yards on seven carries. Those games featured different opponents, blocking conditions, and defensive personnel.
Explosive runs also carried considerable weight in the overall averages. That makes it impossible to isolate jumbo formations as the sole explanation. Still, the formation-specific evidence remains compelling. Next Gen Stats credited Patriots running backs with 7.9 yards per carry and 10 touchdowns on plays featuring an additional offensive or defensive lineman as a blocker during their final eight regular-season games.
The jumbo package gave McDaniels another way to dictate blocking angles. That was the significant development. New England didn’t simply add size for appearance. It deployed extra blockers in situations where their physical advantages could affect the play.
The 2026 Numbers Show Heavy Personnel Isn’t Going Away
Offensive coordinators have continued experimenting with heavier groupings through the opening weeks of 2026. Sharp Football Analysis’ October 13 personnel tracker showed that the Rams used 13 personnel on 31% of their tracked offensive plays. Las Vegas offered another example, deploying two or more tight ends on 60% of its plays. The Raiders used those groupings more frequently than any other team in the published 2026 sample. Meanwhile, Baltimore and Chicago also leaned heavily into multiple-tight-end formations.
Sharp’s historical figures showed the league’s two-plus-tight-end usage climbing from 26% in 2023 to 33% in 2025. Its early 2026 snapshot placed that average at 35% through three games. The direction is clear, even if early-season sample sizes remain limited. Coordinators increasingly want formations that threaten the run without sacrificing their passing menu. However, the league’s defensive response has become more sophisticated.
Modern Defenses Are Learning to Adjust Without Substituting
A coordinator doesn’t necessarily need another linebacker to strengthen the box. He can walk a safety toward the line, reduce an edge defender’s alignment, or shift the defensive front to protect a vulnerable rushing gap. Against condensed formations, defenders can also adjust their spacing before the snap without exchanging personnel.
Those movements matter because heavy personnel packages often seek information as much as physical leverage. An offense wants to know whether a linebacker will follow a motioning tight end. It wants to discover whether the defense rotates into single-high coverage or keeps two safeties deep.
Sometimes the most valuable offensive result comes before the ball moves. A defense that reveals its coverage structure too early gives the quarterback information. One that maintains disguise can make the quarterback’s post-snap read considerably harder. Despite the pressure, sophisticated coordinators no longer treat every heavy formation as a mandatory substitution situation.
Their preferred response depends on the opponent’s blocking ability, tight-end receiving talent, and the defensive players available. That’s why roster construction carries so much weight. A team with a physical nickel defender can challenge 12 personnel differently from a team relying on a smaller coverage specialist. The same formation can demand completely different defensive answers.
The Next NFL Personnel Battle Will Be Won Before the Snap
The next stage of this tactical fight won’t depend simply on which team can collect the biggest tight ends. Offenses will need players who make defensive choices genuinely uncomfortable. A tight end must survive blocks against powerful edge defenders, then threaten linebackers downfield without giving away the play. Fullbacks and extra offensive linemen offer similar possibilities, especially when coordinators disguise their intended responsibilities through motion. Yet still, defenses have begun building counters into their everyday personnel.
Macdonald’s Seahawks provided the clearest blueprint. Emmanwori could enforce the run inside the box while protecting Seattle’s ability to cover multiple receiving threats. New England offered another solution through bigger defensive linemen and stronger base fronts. Neither model guarantees success against every heavy formation. Both demonstrate why offensive coordinators must do more than count defenders. The matchups determine the advantage. A running back needs enough room to punish an undersized box. A quarterback must recognize when a defense adds a linebacker and attack the resulting coverage weakness.
If neither threat materializes, the defense has little reason to change. That places greater importance on pre-snap motion, run-fit manipulation, tight-end versatility, and play-action sequencing. Instead of repeatedly lining up three tight ends and hoping for a third linebacker, offensive coordinators can move those players around the formation. Motion might uncover man coverage or force a safety to declare his run responsibility. Once the defense reacts, the offense can attack the weakness it has created.
However, coordinators like Macdonald have demonstrated that the best answer sometimes involves refusing to react at all. The Rams’ experiences against San Francisco and Seattle offered two versions of the same strategic problem. One defense struggled to cover the passing threats attached to heavier formations. Another accepted those formations without surrendering its preferred personnel. As the 2026 season develops, heavy personnel packages will remain valuable because they challenge defensive flexibility, not because they automatically force base defense.
The next time three tight ends jog onto the field, watch the opposing sideline. If the defensive coordinator reaches for another linebacker, the offense may have already earned an advantage. If he keeps his nickel package, the question becomes far more physical. Can those extra blockers make him regret staying small?
READ MORE: Why running on first down is a statistical trap for trailing NFL offenses
FAQ’s
What are heavy personnel packages in the NFL?
Heavy personnel packages use extra tight ends, running backs, or offensive linemen to strengthen blocking while keeping the option to throw.
Why do NFL defenses use nickel against heavy personnel?
Nickel keeps five defensive backs on the field. Teams like Seattle trust versatile defenders to stop the run without giving up coverage speed.
What is 13 personnel in football?
13 personnel features one running back, three tight ends, and one wide receiver. Teams use it to threaten the run and create passing mismatches.
Why did the Seahawks stay in nickel against the Rams?
Mike Macdonald trusted Seattle’s defensive front and Nick Emmanwori’s versatility. The Seahawks kept their coverage flexibility despite the Rams’ extra tight ends.
How did the Patriots benefit from jumbo personnel in 2025?
New England added bigger blockers to strengthen its rushing attack. Its running backs averaged 7.9 yards per carry on those jumbo plays late in the season.
