Phillies place Aaron Nola on IL with ankle sprain

The Phillies announced that they have placed right-hander Aaron Nola on the 15-day injured list, retroactive to May 15th, due to a sprained right ankle. Right-hander Daniel Robert has been recalled to take his roster spot. Todd Zolecki of MLB.com was among those to report that prospect Mick Abel will be promoted to make his major league debut but only to make a spot start on Sunday. After that, he will be optioned to Triple-A and Taijuan Walker will take Nola’s rotation spot. In other Philly news, manager Rob Thomson relayed that prospect Moisés Chace will undergo Tommy John surgery. Lochlahn March of the Philadelphia Inquirer was among those to pass that along.

Per March, Nola injured his ankle prior to his recent start in Cleveland. He went on to allow four earned runs in five innings in that game. His next start was even worse, as Nola allowed nine earned runs over 3 2/3 innings against the Cardinals on Wednesday.

Perhaps the ankle injury provides an explanation for those outings but Nola was also struggling before that, with a 4.61 earned run average over his first seven starts this year. Though for what it’s worth, he was building a bit of momentum. On April 27th, he pitched seven innings of one-run ball against the Cubs, then six scoreless against the Diamondbacks on May 3rd.

Whether it’s due to the ankle or not, Nola now has a 6.16 ERA on the year. His 23.6% strikeout rate, 7.3% walk rate and 44.6% ground ball rate are all decent numbers, but 11 home runs have pushed more runs across the plate. SIERA, which expects home run rate to normalize, has Nola at 3.66 this year. However, home runs have always been a part of Nola’s game, so that might not be the best metric in this specific instance. The Phillies haven’t provided an estimate for how long they expect Nola to be out but it seems he will miss at least a few turns.

Nola’s injury will allow Walker to return to the rotation. He started his season with six great starts, posting a 2.54 ERA in those. But when Ranger Suárez was ready to come off the IL, someone had to go. Walker got bumped to the bullpen as the Phils ran with a rotation of Suárez, Nola, Zack Wheeler, Jesús Luzardo and Cristopher Sánchez. Walker made two relief appearances, each three innings long. The first was scoreless but he allowed three earned runs in the second one, which came in relief of Nola on Wednesday.

He’ll retake a rotation spot next week, but Abel will get to make his major league debut in the interim. A former first-round pick, Abel’s prospect stock has dropped a bit due to some inconsistent control. From 2021 to 2024, he tossed 375 minor league innings and struck out 26.9% of batters faced but he also gave out walks at a 13.3% clip, leading to a 4.75 ERA.

Despite the rough edges, the Phils added him to their 40-man roster in November, to keep him out of the Rule 5 draft. The early results are encouraging this year. He has a 2.53 ERA through eight Triple-A starts, with a 26.6% strikeout rate and 49.2% ground ball rate. His 9.9% walk rate is still a bit higher than par but an improvement for him. He’ll get a chance to make a brief debut this weekend.

As for Chace, it’s obviously an unfortunate blow for him. Acquired from the Orioles in last summer’s Gregory Soto trade, Chace is one of the club’s top pitching prospects and a fringe top 100 guy. He wasn’t on every list but FanGraphs had him at #74 coming into the year, ESPN at #90 and Baseball Prospectus put him in their #101 slot.

Like Abel, Chace was given a 40-man spot in November to keep him out of the Rule 5 draft. He started this year at Double-A and could have worked his way to Triple-A or even the majors during the 2025 season. That will now be on pause for a long time, as he should be rehabbing until the summer of 2026. The Phils could recall him and place him on the major league 60-day injured list at some point if they so choose. Doing so would open a 40-man spot but would also require Chace to start earning big league pay and service time.

Photo courtesy of Bill Streicher, Imagn Images