Tarik Skubal set to start Saturday vs. Guardians five weeks after elbow procedure

What happened

Tarik Skubal, the two-time reigning Cy Young Award winner, is expected to be activated by the Detroit Tigers to start Saturday's game against the Cleveland Guardians at Progressive Field, per Evan Woodbery of MLive.com. Manager A.J. Hinch made the announcement to the team's beat Thursday morning, and added a second piece of news alongside it: right-hander Casey Mize is likely to follow Skubal back into the rotation on Sunday, though that decision hinges on Mize completing one more bullpen session Thursday before the club finalizes anything.

Neither return was a given a month ago. The Tigers announced in early May that Skubal's elbow contained loose bodies requiring an arthroscopic procedure to address. That procedure took place not even five full weeks ago. The fact that Detroit's ace is reportedly ready to take a major-league mound this weekend — rather than, say, sometime in July — is, by any reasonable measure, a remarkably quick turnaround.

Why it matters

Skubal's return matters for reasons that go well beyond the box score. He is the anchor of a Detroit rotation that has been navigating his absence, and the manner of his comeback adds an unusual wrinkle: per Evan Woodbery of MLive.com, Skubal underwent what is described as an experimental new procedure — a "NanoNeedle" technique — as part of his elbow work. The Tigers have not elaborated publicly on the specifics of that procedure, and the reporting does not detail what it entails beyond the name, so the desk will leave the medical commentary to the people with medical degrees.

What the Tigers have offered is a rehab line. Skubal made one rehab start for Detroit's High-A affiliate, pitching five shutout innings, allowing only two hits, and striking out six. That is the entirety of his competitive work since the procedure. One start, five innings, two hits, six strikeouts — and now, reportedly, he is back in a major-league rotation.

The potential Sunday return of Casey Mize, if the bullpen session goes as hoped, would give Detroit two significant rotation pieces back in the same weekend series. Hinch was careful to frame Mize's return as likely rather than certain, and that framing deserves to be honored: nothing about Sunday is finalized until that bullpen session is complete.

The numbers

The only performance figures Evan Woodbery of MLive.com provides are from Skubal's rehab outing: five shutout innings, two hits allowed, six strikeouts, for Detroit's High-A affiliate. That is a single data point, not a trend, and one minor-league start is not a sample size so much as a proof of concept. What it tells you is that the Tigers saw enough to feel comfortable sending him to Cleveland.

Saturday's probable pitchers at Progressive Field list Skubal opposite Joey Cantillo for the Guardians.

Where the club stands

The Tigers carry a record of 76-86 (.469) into this week, sitting fourth in the AL Central, 9 games back in the division. Detroit has been eliminated from both the division race and the Wild Card race, and the club enters Thursday's home game against the Minnesota Twins on a one-game losing streak, with Keider Montero scheduled against Zebby Matthews at Comerica Park.

Friday's trip to Cleveland opens the series with Jack Flaherty opposing Tanner Bibee, before Skubal is reportedly slated to take the mound Saturday. The Wild Card ranking sits eighth, 8.0 games relative to the cut line — numbers that frame the weekend less as a playoff push and more as a chance to see what the rotation looks like when it is whole again.

That context does not diminish the significance of Skubal's return. A team watching its postseason math evaporate still has reasons to care about what its best pitcher looks like after an elbow procedure and an experimental technique. The competitive calendar may be unkind, but the baseball questions are real.

What we don't know yet

The most immediate unknown is Casey Mize. Hinch described his Sunday return as likely, not certain, and explicitly tied the decision to Thursday's bullpen session. Until the Tigers say otherwise, Mize's spot in Sunday's lineup card is conditional.

Beyond that, the reporting does not detail what the "NanoNeedle" procedure involves, how it differs from a standard arthroscopic approach, or what the Tigers' thinking was in choosing it. There is no timetable, no medical explanation, and no club statement beyond the announcement of the procedure in early May and the apparent speed of Skubal's recovery.

It is also worth noting that Skubal's rehab consisted of one start — five innings for a High-A affiliate. General league mechanics allow pitchers up to 30 days on a rehab assignment before a club must activate or move them; the Tigers are not waiting anywhere near that limit. Whether one rehab outing is the right preparation for a return to major-league competition is a question the Tigers have apparently answered for themselves. The desk reports the decision; the pitching coach lives with it.

What to watch

The obvious thing to watch is Saturday afternoon in Cleveland: Skubal on the mound, five weeks removed from an elbow procedure, facing a Guardians lineup. How deep he goes, how his stuff looks, and whether the Tigers place any visible restrictions on his workload will tell you more than any pre-series announcement can.

Sunday is the secondary watch item. If Mize completes Thursday's bullpen session without issue, Hinch indicated he is likely to start. If something changes, the Tigers will need to make a different call — and the reporting will follow.

The broader question, one that will take longer than a weekend to answer, is what the NanoNeedle procedure means for Skubal going forward. The Tigers have not said, the reporting does not speculate, and neither will the desk. But a two-time Cy Young winner returning from an experimental elbow procedure in under five weeks is the kind of thing that tends to generate follow-up questions. Consider this the first one.