Phillies fans finally got a long-awaited injury update on top prospect Aidan Miller, though the news wasn’t exactly the positive report many were expecting.
While Miller’s back injury had seemingly been improving in recent weeks, with the top prospect even progressing to light baseball activities in late May, Phillies general manager Preston Mattingly’s latest update erased some of that progress.
Miller is no longer participating in any baseball activities, according to Cole Weintraub of NBC Sports Philadelphia. Mattingly also said that there is no true diagnosis at this time, according to Weintraub.
He expects him to play in games this year. There’s no true diagnosis at this time.
— Cole Weintraub (@WeintraubCole) May 31, 2026
Phillies Injury Update: When will top prospect Aidan Miller return to action?
Though the 21-year-old, who will celebrate his 22nd birthday next week, has played just eight games above Double-A, Miller seemed destined to make his MLB debut at some point in 2026. He finished the 2025 campaign on a prolonged hot streak, posting an OPS over 1.000 in 36 games across August and September and earning a late season call up to Triple-A Lehigh Valley.
The infielder finished the season with a .264/.392/.433 line, a performance that was enough to push him to No. 15 on MLB Pipeline’s most recent top 100 list despite not yet taking an at-bat this season.Â
The timing of the setback is particularly poor considering how much the Phillies’ infield has struggled so far in 2026.
Miller's sterling finish and .514 on-base percentage in his first 27 at-bats for the IronPigs had Phillies fans dreaming on the idea that he might replace either second baseman Bryson Stott or third baseman Alec Bohm in the lineup if either struggled to begin 2026.
That’s exactly what’s happened, as both Stott and Bohm have posted an OPS below .700 to begin the season, with Bohm placing inside the bottom 10 of qualified hitters in the league. Both have also been worth negative wins above replacement. Not to mention, shortstop Trea Turner has also struggled to a .622 OPS but has at least been worth a comparatively less paltry 0.2 WAR.
Despite the early struggles that have begun to creep towards the early weeks of summer, all three players have played over 50 of the Phillies’ 59 games thus far due to a lack of alternative options. Edmundo Sosa has seen time at all three positions, though his .211/.250/.344 line hasn’t been much of an improvement.
Having an alternative like Miller who could fill in at any of the three spots or even bounce around would be a godsend as the Phillies continue to flirt with staying over .500 on the season. While that likely won’t be an option any time soon, the good news is that Mattingly doesn’t see 2026 becoming a wash for Miller, still expecting to see him in game action at some point.
With Miller also missing all of Grapefruit League play in spring training, he will likely need a long build-up on a rehab assignment before seeing game action with the IronPigs.
Still, with even younger infield prospects like Kevin McGonigle, Konnor Griffin and Colt Emerson receiving fast-track promotions to the majors already this season, there’s no reason to think that Miller won't be ready talent-wise have an impact in Philadelphia by the end of the year. The only question now is if he’ll be healthy enough.
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