MLB shortstop prospects can lose their defensive reputations on a single ugly throw. A teenager fields a routine grounder, plants his cleats and fires the ball over the first baseman’s head. The crowd groans. The scoreboard flashes an error, and another scout puts a mark in his notebook.
But what happens when that same shortstop never reaches the baseball?
A hard grounder shoots through the left side. The defender takes one hesitant step, watches it skip into the outfield and turns toward the next hitter. No error. No obvious mistake. Just another single.
That is the problem with evaluating young shortstops through traditional statistics. The box score punishes visible mistakes while ignoring countless plays a better defender might have made.
Range, first-step quickness and throwing efficiency often reveal more than a spotless fielding percentage. Major League Baseball has developed sophisticated measurements for those skills, but minor league defensive tracking remains incomplete.
Scouts must fill the gaps themselves. They study video, examine throwing data and watch how teenagers handle difficult hops against increasingly dangerous hitters.
The challenge isn’t finding a shortstop who makes spectacular plays. It’s identifying the defender who can make them consistently when the major leagues stop offering second chances.
Why fielding percentage can make a limited shortstop look elite
Picture two young infielders taking groundballs during batting practice. One stays near his starting position, scoops up everything within reach and makes comfortable throws across the diamond. The other attacks balls deep in the hole, occasionally losing his balance while attempting throws most defenders wouldn’t consider.
Which player deserves the better defensive evaluation?
Traditional fielding percentage might favor the first. The statistic divides successful fielding chances by total chances, treating every recorded error as a failure.
But it cannot measure the opportunities a defender never creates.
Fielding percentage rewards clean execution, not exceptional range. A shortstop with limited lateral movement might look flawless on paper while a more athletic player collects errors attempting difficult plays.
Range factor offers another clue by measuring putouts and assists relative to games or innings. However, it also depends on pitching staffs, defensive positioning and how frequently hitters send groundballs toward a particular area.
For young shortstops, those limitations can distort evaluations before a player reaches the upper minors.
Sebastian Walcott and the difference between arm strength and defensive reliability
Sebastian Walcott offers a revealing example.
The Texas Rangers’ 6-foot-4 infielder possesses one of the strongest throwing arms in professional baseball. MLB Pipeline gave him a 70-grade arm and a 50-grade fielding tool in its 2026 scouting evaluation.
Those numbers tell two different stories.
A 70-grade arm represents exceptional throwing ability on baseball’s traditional 20-to-80 scouting scale. A 50-grade fielding tool projects average major league defense, suggesting that physical strength alone doesn’t guarantee reliable execution.
Walcott committed 24 errors in 88 games at shortstop for Double-A Frisco in 2025, according to MLB Pipeline.
The total sounds alarming. A closer look makes it more useful.
Baseball America’s 2026 scouting report identified wayward throws and misjudged short hops as the main sources of those mistakes. The report did not provide an exact numerical split between throwing and fielding errors.
That distinction matters. Walcott’s defensive struggles involved both receiving the baseball cleanly and delivering accurate throws.
Imagine the challenge of fielding a short hop while moving toward the third-base line. A tall shortstop must lower his center of gravity, get his glove beneath the bounce and recover his feet before throwing across the diamond.
Rush the transfer and the ball can slip. Set the feet too late and even a powerful arm might send the throw off target.
Walcott’s challenge involves coordinating those movements consistently, not simply throwing harder.
His development also faced an interruption in February 2026, when the Rangers announced that he underwent internal brace surgery on his right elbow.
For developing infielders, an exceptional physical tool can raise the ceiling. Turning that tool into dependable performance requires considerably more work.
Statcast measures what the traditional box score misses
Modern defensive analysis asks a better question than whether a shortstop completed a play.
How difficult was that play in the first place?
Outs Above Average (OAA) attempts to measure that difference. MLB’s Statcast system compares a defender’s actual results with the expected outcomes of similar opportunities.
For infielders, the calculation considers the distance to the baseball, available reaction time, throwing distance and the batter-runner’s average sprint speed.
A routine two-hopper straight to the chest and a backhanded stop deep in the hole shouldn’t carry identical defensive value. Statcast recognizes that difference.
A player earns positive credit by completing plays that an average defender would make less frequently. Miss enough manageable opportunities, and his total moves in the opposite direction.
Bobby Witt Jr. shows why defensive range changes everything
Bobby Witt Jr. provides an excellent major league benchmark.
Baseball Savant’s completed 2025 regular-season data credits the Kansas City Royals shortstop with 24 Outs Above Average. That followed a minus-9 OAA season specifically at shortstop in 2022.
The improvement reveals something fielding percentage cannot explain nearly as clearly.
Witt did more than become comfortable handling groundballs. He transformed how often Kansas City converted difficult contact into outs.
According to Baseball Savant, he completed 76% of his tracked defensive opportunities in 2025, compared with an estimated success rate of 72%.
Four percentage points may sound modest. Over hundreds of opportunities, that gap represents a substantial defensive advantage.
His performance also shows how positioning and movement work together. A defender who reads contact quickly can establish a better angle before the ball reaches the dirt. That early advantage often determines whether he makes a balanced throw or desperately throws while falling away from first base.
For MLB shortstop prospects, Witt offers evidence that defensive ability can improve dramatically after reaching the majors.
But there is a catch.
Public minor league Statcast data do not provide the same comprehensive Outs Above Average measurements available for established major leaguers.
That blind spot makes the classic eye test more vital than ever.
Evaluators must study a player’s first step, body control and throwing mechanics without relying on a complete public defensive leaderboard. Video and physical measurements help, but neither supplies the entire picture.
Konnor Griffin brings the tools scouts want to measure
Few young infielders illustrate the appeal of elite defensive athleticism better than Konnor Griffin.
The Pittsburgh Pirates selected Griffin ninth overall in the 2024 MLB Draft. His impressive physical tools initially raised an interesting positional question: Would he become a shortstop or center fielder?
Pittsburgh explored both possibilities.
Griffin eventually strengthened his case at shortstop, where his speed, quick reactions and powerful arm helped him cover difficult ground.
MLB Pipeline assigned him 70-grade speed, a 70-grade arm and a 60-grade fielding tool entering 2026.
He backed up that scouting reputation on the field.
During the 2025 minor league season, Griffin committed just seven errors in 89 games at shortstop, producing a .980 fielding percentage. Minor League Baseball subsequently named him its Gold Glove winner at the position.
The numbers are impressive, but Griffin’s athleticism explains why scouts viewed him as more than a reliable glove.
What Griffin’s 86.7 mph throwing velocity actually measures
MLB Pipeline’s April 2026 Statcast analysis examined Griffin’s throwing strength using available tracked games from the preceding two years.
The average velocity of his hardest five percent of recorded throws reached 86.7 mph.
Using Baseball Savant’s major league arm-strength methodology, that figure would have placed Griffin 11th among 57 qualified MLB shortstops in 2025.
Those numbers need context.
The sample drew from games with available Statcast coverage, including his time in the Single-A Florida State League and spring competition. MLB Pipeline specifically warned that incomplete tracking at High-A and Double-A could affect the overall average.
Griffin’s hardest recorded infield throw reached 90 mph on March 18, 2026, during spring training.
The radar readings confirm what scouts saw. His arm carries enough strength to make demanding throws from deep shortstop.
Still, throwing velocity only tells part of the story.
Watch the mechanics behind a difficult groundball. The defender must reach the ball, bring it into his throwing hand and create enough momentum to deliver an accurate throw.
An extra shuffle can erase the advantage of a powerful arm. A clean transfer, meanwhile, can help a less physically gifted defender beat a fast runner by a fraction of a second.
Griffin’s combination of speed, range and arm strength gave him an unusually broad defensive foundation as he approached his April 2026 major league debut.
But his path isn’t a blueprint.
Some highly rated young shortstops possess the explosive tools to make every difficult play look possible. Others depend on excellent hands, intelligent positioning and anticipation to survive at the position.
That contrast brings two very different young infielders into focus.
Kevin McGonigle and Josuar Gonzalez reveal two defensive paths
Defensive projection becomes especially difficult when an outstanding young hitter doesn’t possess the complete athletic package of a traditional shortstop.
Teams must decide how much defensive value they might sacrifice by keeping his bat at the position.
Kevin McGonigle entered 2026 with precisely that question surrounding his future.
Kevin McGonigle’s reliable glove faces a range problem
The Detroit Tigers infielder built his reputation around exceptional contact skills and advanced offensive discipline.
His defensive limitations were more subtle.
Baseball America’s 2026 preseason evaluation gave McGonigle a 55-grade fielding tool and 45-grade arm. Scouts praised his reliability but questioned whether his range and throwing strength would hold up at shortstop.
The concern becomes particularly visible on balls hit toward his backhand.
A shortstop must travel farther, gather the ball while moving away from first base and produce a strong throw without always setting his feet.
McGonigle’s arm leaves less margin for error on those plays.
Baseball America projected that his defensive tools would fit more naturally at second base, where he could potentially become an above-average defender.
That doesn’t make him an inferior overall prospect. A talented hitter can provide enormous value at another infield position.
Teams simply have to ask a difficult question: Does keeping his bat at shortstop justify the defensive limitations?
The answer depends on more than fielding percentage. It requires understanding how frequently those limitations turn potential outs into hits.
Josuar Gonzalez builds his reputation on anticipation
Josuar Gonzalez, the San Francisco Giants’ young switch-hitting infielder, approaches the position from another direction.
Baseball America’s 2026 preseason scouting report assigned Gonzalez a 70-grade fielding tool. MLB Pipeline offered a more conservative 60-grade projection.
Both evaluations recognized his quick first step, athletic movements and strong defensive instincts.
Gonzalez committed five errors in 186 chances at shortstop during the 2025 Dominican Summer League season, according to Baseball Savant. His .973 fielding percentage provides evidence of reliable execution.
But the scouting reports explain why evaluators see a higher defensive ceiling.
Gonzalez moves fluidly across the infield and reads groundballs quickly. Instead of depending entirely on recovery speed, he can gain an advantage through anticipation and positioning.
Think of the difference between reacting to a grounder after it passes the pitcher’s mound and already moving toward the correct hop.
The first defender must rush. The second has time to control his body and make a cleaner throw.
Gonzalez still faces the challenge of proving his skills against more advanced competition. His limited professional experience also means that evaluators must separate genuine defensive instincts from advantages that younger competition may exaggerate.
For these rising infielders, such uncertainties are unavoidable.
A scouting grade projects what a player might become. It does not guarantee that his glove will reach that standard.
The speed of major league baseball exposes every defensive weakness
A young shortstop can survive imperfect footwork in the lower minors. Against elite major league athletes, the same mistake can cost an out.
Consider Elly De La Cruz.
Baseball Savant recorded an average sprint speed of 30.0 feet per second for De La Cruz in 2024. That’s exceptional even by major league standards, where the average sits around 27 feet per second.
Now imagine a shortstop handling a groundball deep in the hole with that kind of runner charging toward first base.
The defender has little time to spare. One unnecessary step can turn a potential out into an infield single.
Hard contact creates another challenge.
A sharply hit grounder gives the shortstop less time to choose his angle. If the ball takes an awkward hop, the defender must adjust his glove while keeping his body under control.
These situations expose the difference between impressive athleticism and efficient defensive movement.
Why scouts study footwork instead of highlights
An outstanding defensive prospect doesn’t need to dive for every ball.
Sometimes, the most impressive movement happens before viewers notice anything unusual.
A shortstop takes a small preparation step as the pitch approaches. He reads the hitter’s swing, adjusts his weight and breaks toward the ball without crossing his feet unnecessarily.
The play ends with an ordinary-looking throw to first.
On television, it barely registers. To a scout, those early movements can reveal more than a spectacular diving stop.
Evaluators also examine how a player handles double-play feeds, recovers from bad hops and adjusts his throwing motion from difficult angles.
As prospects climb the minor league ladder, those details become harder to hide. Faster runners punish slow transfers, while better hitters expose poor positioning.
That is why defensive development rarely follows a straight line.
Walcott must refine the consistency of his hands and throws. Griffin’s athletic foundation offers exceptional possibilities, while McGonigle’s profile raises positional questions. Gonzalez must prove that his advanced instincts survive tougher competition.
Their differences explain why evaluating MLB shortstop prospects demands individual assessments rather than a universal defensive formula.
The next elite shortstop will be measured by the outs nobody expected
The next generation of shortstops will enter a game that understands defensive value better than ever.
Statcast has already changed how teams evaluate established major league defenders. Outs Above Average identifies the plays traditional statistics overlook, while throwing measurements help separate arm strength from reputation.
The challenge now lies in applying those lessons to developing players.
Minor league tracking remains incomplete, and scouting grades still depend partly on judgment. A defender who looks exceptional in Single-A may struggle when opponents begin hitting the ball harder and running faster.
Physical growth introduces another uncertainty.
A teenager who moves effortlessly at shortstop might lose some lateral quickness as he adds muscle. Another player could improve his balance and footwork enough to overcome an ordinary throwing arm.
Teams cannot settle those questions through one defensive statistic.
The strongest evaluations examine how a player reaches the baseball, how quickly he transfers it and whether he consistently chooses the right throw.
They also account for mistakes.
A prospect who commits errors while attempting difficult plays deserves a different evaluation from someone who repeatedly mishandles routine grounders. That distinction can influence whether an organization keeps him at shortstop or prepares him for another position.
Better tracking will eventually make some of those decisions easier. But the game will still demand experienced observers who understand what the numbers cannot capture.
Somewhere in the minor leagues, a young shortstop takes two steps into the hole. His cleats dig into the dirt as he fields a sharp grounder off his backhand. The throw comes across his body, barely beating the runner to first.
The crowd applauds the arm. A scout studies the first step.
Next inning, another grounder shoots through the same opening. This time, the defender doesn’t reach it.
The official scorer records a hit and moves on.
For the people trying to identify baseball’s next elite shortstop, that missed opportunity might be the most revealing play of the afternoon.
READ MORE: 2026 MLB Shortstop Prospects Beyond the Errors and Elite Arms
FAQs
Q1. What defensive metrics matter most for MLB shortstop prospects?
Range, first-step quickness, throwing accuracy and Outs Above Average help evaluate shortstop defense. Scouts also study footwork and positioning.
Q2. Why doesn’t fielding percentage tell the whole story?
Fielding percentage counts recorded chances and errors. It doesn’t measure the difficult groundballs a shortstop never reaches.
Q3. What is Outs Above Average in baseball?
Outs Above Average measures how many outs a defender saves compared with an average player. It considers how difficult each opportunity is.
Q4. How strong is Konnor Griffin’s throwing arm?
MLB Pipeline reported an 86.7 mph average for Griffin’s hardest five percent of tracked throws. His fastest recorded infield throw reached 90 mph.
Q5. Can a top MLB shortstop prospect move to another position?
Yes. Teams sometimes move prospects to second or third base when their range, arm strength or defensive skills fit another position better.
