Edwin Díaz set to return Friday, but October role remains unresolved

Edwin Díaz is expected to return from his rehab assignment on Friday, according to MLB.com's Sonja Chen, after completing a fifth rehab outing that included one scoreless inning. The return itself appears to be on track. What happens after that — specifically, whether Díaz factors into any October plans — is less settled.

The Mets, for their part, are 69-83 and eliminated from both the division race and the Wild Card race, so the October conversation is more philosophical than operational at this point. Still, the question of how Díaz is used down the stretch, and whether he can re-establish himself as a reliable late-inning option, is the real story here.

What happened

Per Sonja Chen at MLB.com, Díaz went one scoreless inning in his fifth rehab outing, and the club is targeting a Friday return. Chen's piece does not describe the return as a formal club announcement — it is an expectation, with the explicit caveat that his role in October is not guaranteed.

That caveat carries some weight. Díaz has been working his way back through a rehab assignment, and five outings represents a meaningful stretch of readiness work. Under general league mechanics, pitchers on rehab assignments have up to 30 days before they must be activated or moved, so the timeline here is consistent with a club managing a return carefully rather than rushing one.

Friday's game at Citi Field has Zac Thornton listed as the Mets' probable starter against a Philadelphia Phillies opponent whose starter is listed as TBD. If Díaz is activated as expected, that series provides an immediate opportunity to see what he looks like in live regular-season action.

Why it matters

Even on a team that has been mathematically eliminated, the return of a high-profile reliever carries operational significance. The Mets have had a turbulent stretch in their bullpen. Two days before Díaz's expected return, Robert Stock was placed on the IL and is done for the season, per a verified Posterior item. A day before that, Shane Baz exited a start early after taking a comebacker off his elbow, raising questions about his availability going forward.

That is the context into which Díaz is stepping. The back end of a September roster is rarely tidy, and this one has had its share of disruption. A healthy, functional Díaz — even in a lost season — gives the organization something useful: a data point on where he stands heading into the offseason.

The October role question, as framed by Sonja Chen, is the honest acknowledgment that returning from a rehab assignment and being trusted in high-leverage situations are two different things. The Mets are not going to hand him a role; he will need to demonstrate he has earned it. Given that there is no postseason to speak of for this club, "October" here likely refers to any potential extended-season scenario or simply serves as shorthand for the club's confidence level in him as a weapon.

Where the club stands

The Mets are 69-83 (.454), sitting fifth in the NL East, 19.5 games back in the division. They rank 10th in the Wild Card picture, 14.0 games relative to the cut line. They have lost four straight. Both postseason paths are closed.

The upcoming schedule is a three-game home series against the Philadelphia Phillies at Citi Field. Thursday features Nolan McLean against Aaron Nola. Friday — the day Díaz is expected to return — has Zac Thornton on the mound for New York against a Phillies starter not yet listed. Saturday closes the series with Christian Scott facing a TBD opponent.

Playing the Phillies in late September while eliminated is its own particular flavor of baseball: the opponent is likely still chasing something, which means the games have competitive texture even if the standings implications run in only one direction. For Díaz, that is actually useful. He will not be pitching in a vacuum.

What we don't know yet

### Is the Friday return a done deal?

Not quite, per the framing in Sonja Chen's piece. The expectation is there; a formal club announcement is not. Chen's reporting preserves that uncertainty explicitly, and the activation has not been described as complete.

Beyond the activation itself, the October role question is genuinely open. Chen's piece frames it as something Díaz will need to earn, not something that comes automatically with a return from rehab. What the threshold looks like — how many outings, what the performance bar is — is not specified in her reporting.

The bullpen picture around him is also still forming. With Stock done for the season and Baz's status uncertain following the comebacker incident earlier this week, the late-inning landscape is not fully drawn. Where Díaz fits within that, and in what leverage situations he might appear, remains to be seen.

The roster has been in motion in other ways as well. Christian Cairo was claimed off waivers from the Phillies two days before Díaz's expected return, and Chris Devenski was outrighted to Triple-A Syracuse after clearing waivers. The club is making decisions, even in a lost season, and how all of those pieces interact with Díaz's return is not yet clear.

What to watch

Friday's game against Philadelphia is the immediate focal point. If Díaz is activated as expected, his first regular-season appearance back will tell the club — and anyone watching — something about where he is physically and mechanically. One scoreless rehab inning is an encouraging sign, but the jump from a rehab environment to a live game against a Phillies lineup with something to play for is a different kind of test.

The broader watch item is how the Mets manage their remaining September games with an eye toward whatever comes next. The club is making moves, the bullpen has absorbed real disruption this week, and Díaz's return is one more piece of that puzzle.

Whether he looks like the reliever the Mets have counted on, or whether five rehab outings have simply confirmed he is healthy enough to pitch without yet confirming he is sharp enough to trust in meaningful spots — that is the question the next few weeks will answer. The Mets cannot do anything with the answer in October. But they will carry it into the offseason, and that is not nothing.