NFL heavy personnel forces a defense to reveal itself before the quarterback ever claps for the snap. When a second or third tight end jogs onto the field, linebackers creep toward the line and safeties start counting gaps. The picture screams run. In 2026, that extra muscle can be a trap.
A few years ago, spread football and three-receiver sets looked like the permanent language of the league. Defenses adapted with faster linebackers, lighter boxes, nickel packages, and split-safety shells built to erase explosive passes. Offenses have answered by getting bigger without surrendering space. Suddenly, a formation that looks built for four hard yards can produce the cleanest throw on the call sheet.
That tension drives the rise of heavy personnel. The best offenses are not using 12 personnel and 13 personnel simply to overpower smaller defenders. They are using tight ends to make defenses declare their intentions. Sub in linebackers, and coverage gets slower. Stay in nickel, and the offense can lean on the run. The question is no longer whether teams can bulk up. It is whether they can make that size play like speed.
The league got bigger for a reason
The code is simple. 12 personnel means one running back, two tight ends, and two wide receivers. 13 personnel adds a third tight end and removes another receiver.
What those labels fail to capture is how elastic the formations have become. A tight end can attach to the tackle on one snap, shift into the slot on the next, then motion across the formation before the ball moves. That flexibility lets an offense change the defensive picture without changing players.
Next Gen Stats research analyst James Reber traced the league-wide shift after the 2025 season. His NFL.com analysis tracked offenses using packages with fewer than three wide receivers on 41.7% of plays, the highest rate of the Next Gen Stats era. From Week 10 onward, offenses pushed that figure to 44.5%. Defenses countered by deploying base personnel on 29.7% of snaps, up sharply from a 20.5% low in 2023.
There lies the leverage point. NFL heavy personnel can drag bigger defenders onto the field, then force those defenders to survive in space. It can also keep nickel personnel on the grass and challenge defensive backs to fit the run.
Opta Analyst found the same trend from another angle. Usage of two- and three-tight-end sets rose by more than 2.4 percentage points from 2024 to 2025. Offensive success rate from those groupings climbed another 1.9 points. More revealing, offenses in 2025 posted a higher success rate passing from 13 personnel than running from it, 37.1% to 34.7%.
That separates the modern version from old-school jumbo football. Size still matters. Ambiguity matters more.
The best heavy packages are passing packages in disguise
Through Week 3, the clearest examples sit in Cincinnati, Seattle, Baltimore, and Los Angeles. Their approaches differ, but one idea connects them: show enough run threat to change the defense, then attack the matchup that appears.
The numbers here come from SumerSports’ public Personnel Tendency dashboard. Its data was last updated September 28 at 10:20 p.m. ET. That cutoff matters because three games can distort efficiency. Even so, the early splits reveal where coordinators are finding leverage.
Cincinnati makes 12 personnel feel like spread football
The Bengals are living in 12 personnel. Through the September 28 update, they had used it on 38.2% of their first 178 offensive plays, compared with a 21.29% league average. No team generated more total EPA from the grouping: 22.13.
More interesting is what happens when Joe Burrow throws. Cincinnati averaged 0.72 EPA per pass from 12 personnel, compared with minus-0.01 per rush. That does not mean the Bengals should abandon the ground game. The run threat helps create the passing picture.
Personnel makes the stress easy to visualize. Cincinnati’s current tight end room includes Drew Sample and Mike Gesicki, while Ja’Marr Chase remains the offense’s premier outside problem. The Bengals list Sample as their starting tight end, and the club has built the room around several distinct skill sets.
Put Sample tight to the formation and Gesicki in space, and the defense has a decision to make. Keep a linebacker over Gesicki and Burrow can hunt that coverage matchup. Replace the linebacker with a defensive back and the box gets lighter. Meanwhile, Chase can find himself isolated away from the congestion.
That is heavy personnel doing spread-offense work. Cincinnati does not need three receivers to stretch a defense horizontally. Its tight ends can create the width themselves, and Seattle reaches the same pressure point with a different disguise.
Seattle turns the second tight end into camouflage
The Seahawks used 12 personnel on 30.17% of their plays through the September 28 update. They generated 14.22 total EPA from the package, second only to Cincinnati. More telling, Seattle threw on 62.96% of those snaps.
Rather than tipping off a run, the second tight end acts as camouflage. That concept already powered Seattle’s 2025 offense. Reber’s Next Gen Stats study clocked the Seahawks at 7.5 yards per play from 12 personnel, the best mark in the NFL and one of the strongest team outputs from the grouping over the previous decade.
The 2026 offense has kept the disguise alive. Seattle has averaged 0.43 EPA per pass from 12 personnel through three games, while its rushing EPA from the grouping sits just below zero. Still, the threat of the run holds immense value because defenders must respect the blocking surface.
One hard downhill step from a safety can open a throwing window behind him. If a linebacker widens with play action, a crossing route can replace him. Soon, one grouping can carry two opposite messages. The defense sees a formation sturdy enough to run. Quarterbacks see a coverage structure vulnerable to the pass.
Seattle proves two tight ends can hide intent. Baltimore takes the same problem and adds another body.
Baltimore and the Rams push the idea into 13 personnel
The jump from two tight ends to three turns the pressure up another notch. Baltimore has used 13 personnel on 17.98% of its offensive plays, more than twice the league average of 8.33%.
The Ravens have thrown on only 37.5% of those snaps. Yet the small passing sample has been explosive at 1.02 EPA per pass. Their rushing average from the package sits at minus-0.24 EPA.
Those numbers cover only 32 total 13-personnel plays, so the sample demands caution. The structure, though, makes football sense. Three tight ends can pull heavier defenders onto the field. One convincing play fake can turn a run-first reaction into open grass.
Zay Flowers offers the clearest Baltimore example of why that matters. Jason La Canfora reported for Sports Illustrated in July that Flowers produced 81 catches for 1,146 yards from 12 and 13 personnel during Todd Monken’s three seasons from 2023 through 2025. Mark Andrews ranked second on the Ravens over that span with 585 receiving yards from those groupings.
Flowers becomes the small, sudden piece surrounded by bigger bodies. When Baltimore condenses the formation and adds tight ends, defenses lose some natural answers for his speed. A linebacker-heavy unit risks losing him in coverage. Keeping a lighter package on the field creates another problem at the point of attack.
Los Angeles built the louder version of that blueprint by turning 13 personnel into a defining part of its 2025 offense, then leaning even harder into it in 2026. SumerSports tracked the Rams at an extraordinary 42.21% usage rate through three games. Their passing plays from the grouping averaged 0.54 EPA, compared with minus-0.18 per rush.
That split captures NFL heavy personnel at its most dangerous. The formation can resemble a battering ram and still create its greatest value when the quarterback pulls the ball back and throws.
Buffalo shows where the idea can break
There is a warning inside the trend. Bigger does not automatically mean better.
Buffalo used 13 personnel on 32.07% of its plays through the same SumerSports cutoff, second only to the Rams. Yet the Bills produced minus-4.63 total EPA from those snaps. Their passing EPA per play sat at minus-0.06, while their rushing mark was minus-0.09.
Those results make Buffalo an important counterweight to the early success stories. Heavy personnel works when it creates uncertainty. Once a defense recognizes the formation, motion, and likely answer, the offense loses much of the leverage it wanted.
Predictability can surface in several ways. A third tight end who rarely releases into a route lets a safety trigger downhill. Static formations allow linebackers to set their fits early. Limited motion makes coverage rules easier to communicate.
The difference between Baltimore and Buffalo through three games is not simply talent or size. Baltimore has squeezed explosive passing value from a smaller 13-personnel sample. Buffalo has used the grouping far more often without producing the same efficiency.
Three tight ends create possibilities. They do not create answers. That distinction also explains the defensive response now taking shape across the league.
Defenses are trying to take the substitution game away
The cleanest counter to heavy personnel is not necessarily another linebacker. It is a defender who can survive both versions of the play.
When an offense sends out extra tight ends, it wants the defense to choose. Match size with size, and the offense can attack slower coverage players. Stay in nickel, and the offense can challenge smaller bodies against the run. Hybrid defenders blur that choice.
Seattle showed one version in 2025 with Nick Emmanwori. Reber’s Next Gen Stats data showed Seattle keeping nickel on the field against offensive sub-packages on 77.8% of plays, with the 6-foot-3, 220-pound safety helping make that flexibility possible. No other defense reached 61%.
That versatility let Seattle keep five defensive backs on the field without conceding the same amount of size against the run. It attacked one of the offense’s favorite games directly: send in bigger bodies and force the defense to substitute.
Baltimore’s Kyle Hamilton represents the same broader archetype. At 6-foot-4 and more than 220 pounds, Hamilton gives a coordinator a defender who can fit the run, match tight ends, pressure the quarterback, and disguise his assignment before the snap. Players with that profile make 12 and 13 personnel harder to use as a substitution weapon.
This is the natural next phase of the Buffalo lesson. If a heavy package becomes predictable, versatile defenders can attack it without changing personnel. The offense no longer wins simply by forcing the defense into the wrong body type.
Now the chess match shifts again. If defenses can stay light without becoming small, NFL heavy personnel loses some of its power to dictate substitutions. Offenses then need motion, alignment changes, credible route threats, and players who can change jobs without leaving the field.
Roster construction already reflects that demand. NFL.com noted that teams selected 21 tight ends in the 2026 NFL Draft, while Opta connected the position’s rising value to the growth of multi-tight-end offense.
The ideal tight end no longer fits neatly into “receiver” or “blocker.” He must threaten both jobs often enough to keep the defense guessing.
The next edge is disguise, not size
The first three weeks of 2026 have made one point hard to miss: NFL heavy personnel is not a retreat from modern offense. At its best, it is modern offense wearing bigger shoulder pads.
Cincinnati shows how 12 personnel can generate passing efficiency without surrendering a credible run surface. Seattle uses the second tight end to hide intent. Baltimore has turned limited 13-personnel throws into explosive value, while the Rams keep pushing the package toward a full offensive identity. Buffalo supplies the necessary warning. Volume alone solves nothing.
The next stage arrives when defenses stop treating every extra tight end as a reason to substitute. Bigger safeties, flexible nickel defenders, and hybrid fronts can keep speed on the field without conceding the run. Once that happens, offenses must create conflict after the huddle breaks rather than relying on the personnel announcement to do it for them.
That is why the future of heavy personnel depends on disguise. Motion can turn a wing tight end into a slot receiver. A condensed set can open into a spread look seconds before the snap. Play action can punish one false step from a safety expecting the run.
Before long, the terminology may matter less than the threat. Twelve personnel does not have to mean power football. Thirteen personnel does not have to mean short yardage. Modern offenses are already proving both points.
The defender still sees three tight ends and braces for contact. Then the ball leaves the quarterback’s hand over his shoulder.
That hesitation, more than the extra 250-pound body, is the real edge.
READ MORE: The Tight End Mismatch Ladder: How Offenses Force Safeties Into Bad Math
FAQs
Q1. What is 12 personnel in the NFL?
12 personnel uses one running back, two tight ends and two wide receivers. Teams can run or pass without changing the players on the field.
Q2. What does 13 personnel mean in football?
13 personnel features one running back and three tight ends. That leaves one wide receiver and gives offenses a powerful run-pass disguise.
Q3. Why are NFL teams passing from heavy personnel?
Extra tight ends can force defenses into slower, bigger personnel. Offenses can then attack linebackers and safeties through the air.
Q4. Which NFL team uses 13 personnel the most in 2026?
Through the September 28 SumerSports update, the Rams led the league by using 13 personnel on 42.21% of their offensive plays.
Q5. How can defenses stop heavy personnel?
Hybrid safeties can help. Players such as Nick Emmanwori give defenses enough size against the run without sacrificing coverage speed.
