It hasn’t taken the Philadelphia Phillies’ top prospect Aidan Miller long to turn heads at 2026 Spring Training. The 21-year-old wasn’t just making contact — he put on a show during batting practice on Tuesday. Miller’s debut buzz is building before a single exhibition game has been played in Florida.
Philadelphia Phillies Top Prospect Aidan Miller Hits Monster Home Run at Spring Training
According to NBC South Philly’s Spencer McKercher, Miller’s first swing of live BP on Tuesday reportedly hit the roof of the Frenchy’s restaurant beyond the left-field wall — with president of baseball operations Dave Dombrowski watching the whole thing.
That’s the kind of moment that turns a spring storyline into an organizational inflection point, especially when the front office is already tinkering with how to get this kid on the field.
Miller’s Minor League Numbers Back Up the Hype
This isn’t just BP theater. Miller slashed .264/.392/.433 across Double-A Reading and Triple-A Lehigh Valley in 2025, racking up 14 homers and a jaw-dropping 59 stolen bases in 116 games. His 15.6% walk rate and 137 wRC+ show the kind of patient, high-impact bat that plays in any lineup, and his late-summer surge — a .356/.491/.607 line over his final 36 games — is the reason scouting evaluators started whispering that this kid is closer to Trea Turner than your standard prospect hype job.
The national prospect community has taken notice. The Athletic ranks Miller No. 6 in all of baseball, ESPN slots him 10th, and MLB.com pegs him at No. 23 on their Top 100.
What This Means for Alec Bohm’s Future in Philadelphia
Here’s where it gets spicy. Manager Rob Thomson already confirmed that the majority of Miller’s spring work will be at third base and shortstop — not left field, not second base as a utility project. That’s a direct runway aimed at Alec Bohm’s position.
Bohm is entering the final year of his contract after a 2025 where he hit .287 with just 11 home runs and a .740 OPS, numbers that dipped further when a left shoulder cyst messed with his swing for chunks of the season. ESPN’s Eric Karabell already went on record predicting Miller wins the third base job by Memorial Day and rides a .280/20/25 line to NL Rookie of the Year, with Bohm getting traded to the White Sox.
Bryce Harper Considered Mentor For Miller
The Philadelphia Phillies aren’t being subtle about any of this. When Miller showed up to Clearwater on Day 1 — before position players were even required to report — his locker was right next to Bryce Harper’s. That placement wasn’t an accident.
The hype train could be out of control soon, and it won’t be long until we see top prospects such as Miller and Pittsburgh’s Konnor Griffin hitting moonshots in real games.
Phillies’ Top Prospect Crushes Roof Shot in 1st Spring Swing