Joe Musgrove's 2026 return with Padres now uncertain after recovery stalls

What happened

Joe Musgrove's path back to the Padres rotation has hit another wall. Per Kevin Acee of the San Diego Union-Tribune, the right-hander is not recovering between rehab outings as quickly as he would like, and it is no longer certain he could rejoin San Diego at any point in 2026. Padres manager Craig Stammen attributed the issue to arm fatigue — not the starts themselves, but what happens in the days between them.

The report arrives after what had appeared, not long ago, to be a genuine return trajectory. Musgrove had Tommy John surgery and flexor tendon repair in October of 2024, missed the entire 2025 season, and had been expected to contribute meaningfully this year. That expectation has been repeatedly deferred.

Why it matters

The operational weight of this update is considerable. Musgrove is not a depth piece; he is a front-of-the-rotation arm whose presence or absence reshapes what San Diego can reasonably ask of its pitching staff down the stretch. A team sitting 74-67 and chasing a postseason berth does not absorb that kind of uncertainty without consequence.

The rehab timeline itself tells the story of a recovery that has refused to cooperate. Musgrove began a rehab assignment on August 4, throwing 2 2/3 innings in a Single-A game. Five days later, on August 9, he made a second rehab start at Triple-A, logging 3 1/3 innings. Five days after that, on August 14, he reached 4 2/3 innings — a modest but measurable progression. Then the calendar stretched. His next start did not come for 12 days, arriving on August 27. He did throw five innings in that outing, but per the Union-Tribune report, the gap itself is the signal. The innings are there; the recovery between them is not.

That pattern — workload holding, turnaround lagging — is the particular frustration of post-Tommy John returns, where the arm can perform in a given outing while still demanding more rest than a major-league schedule will ever willingly provide. The 30-day rehab window that governs pitchers under general league rules adds a structural layer to the situation: the clock for a rehab assignment is finite, and each extended gap between starts consumes it.

The numbers

The Padres enter September at 74-67 (.525), sitting second in the NL West, 10 games back of the division lead, and riding a one-game winning streak. That record places them in the thick of a wild-card conversation, where every rotation decision carries amplified weight.

The upcoming schedule does not offer much breathing room. Wednesday's game at Cincinnati features Casey Mize against Brandon Williamson. The weekend brings the New York Yankees to Petco Park: Walker Buehler is the probable starter Friday against Max Fried, and Robbie Ray is lined up Saturday opposite Carlos Rodón. That is not a schedule that forgives a thin rotation.

Where the club stands

At 74-67, San Diego is a team that knows exactly what it needs and is currently working with what it has. Second place in the NL West, 10 games back, means the division is effectively a spectator sport at this point — the Padres' September is about accumulating wins and staying ahead of whatever is moving behind them in the wild-card picture.

The rotation as currently constructed will have to carry that assignment without Musgrove, at least for now. The expansion of active rosters from 26 to 28 players from September 1 through the end of the regular season gives clubs more flexibility to manage arms, but it does not conjure a front-line starter from the organizational ether. What it does allow is more creative bullpen deployment and the ability to carry an extra arm for length — a small comfort when the name you were hoping to pencil into a late-season start is instead managing arm fatigue between Single-A and Triple-A outings.

The Ethan Salas call-up, reported earlier this week, reflects the club leaning into the expanded roster window for positional depth, with the 20-year-old catcher making his Major League debut. That move and the Musgrove update together sketch a September in which San Diego is simultaneously adding youth and absorbing the absence of experience — the kind of roster arithmetic that makes September both exciting and uncomfortable in equal measure.

What we don't know yet

The Union-Tribune's account does not specify a revised timetable for Musgrove's return, nor does it indicate whether the club is considering any roster or IL designation change. The uncertainty is genuine: per the report, it is not certain he could return in 2026, which is a meaningfully different statement than "he is expected to miss additional time." One is a projection; the other is an open question.

It is also not reported what the next step in his rehab program looks like — whether he will attempt another start, whether the gap between outings will be extended further, or whether the club and Musgrove are reassessing the overall plan. The arm fatigue characterization comes from manager Craig Stammen, per the Union-Tribune, but the report does not include a medical diagnosis or a structural explanation for the slow recovery.

What to watch

Is Musgrove going to make another rehab start?

That is the immediate question. His August 27 outing — five innings, 12 days after his previous start — is the last data point the report provides. Whether he attempts to build on that or whether the recovery timeline forces another extended pause will determine whether a 2026 return remains plausible or quietly becomes a question for a future spring.

Watch also for any roster or IL status update from the club. A pitcher on the 60-day injured list is removed from the 40-man roster count under general league rules, reflecting the extended nature of a recovery. Any change to that designation would be a meaningful signal about how the organization is reading his trajectory.

The broader rotation picture — how Mize, Buehler, Ray, and the rest of the staff hold up through a September schedule that includes the Yankees at Petco Park — will run in parallel. San Diego does not need Musgrove to reach the postseason, but the margin for error in a 74-67 season is narrow enough that his absence registers in the math even when it does not appear in the box score.

The desk will be watching the rehab ledger. Five innings on August 27 is encouraging in isolation. What happens in the days that follow is the actual story.