2027 Mariners auditions are in full swing with top prospect Michael Arroyo's call-up

Michael Arroyo did not get called up alongside Lazaro Montes when rosters expanded last Tuesday. It is telling that just a few days later, Arroyo is now in the Seattle Mariners' starting lineup for Sunday's finale of a four-game set against the Athletics. The tide, it seems, has turned.

To call this moment "bittersweet" is putting it mildly. This weekend's series against the A's was meant to be a start of a season-saving rally by the Mariners. They're instead looking to avoid a sweep and to climb to "only" 10 games under .500 with 19 games left to go.

Technically, they're still fighting for a playoff spot. Realistically, they're fighting for dignity and for some hope for 2027.

Hence why Arroyo, MLB Pipeline's No. 45 prospect, is suddenly in the mix less than week after the Mariners passed on promoting him from Triple-A Tacoma. There was some lingering uncertainty about the 21-year-old, specifically over where he fits defensively. But now that the Mariners' playoff cause is all but lost, the harm in bringing him up to see what he can do is basically nonexistent.

What Michael Arroyo does (and doesn't) bring to the Mariners

The defensive questions looming over Arroyo are real. He's a second baseman and left fielder by trade, yet he's generally not considered a viable regular at the keystone and he somehow only had a .967 fielding percentage across 572.2 innings as a left fielder in the minors this season.

So, how he fits in going forward is very much a TBD thing. He's not replacing Cole Young at second base. He could take Randy Arozarena's spot in left field if the three-time All-Star leaves as a free agent, but that might not be a good idea either.

What Arroyo can do is hit.

He's coming to the majors with a .396 OBP for his career in the minors. He's also been hot, as he shook off a slow start to the season to bat .296/.374/.502 with 13 home runs over 78 games. He dropped his strikeout rate after going from Triple-A to Double-A, which is not normally how it works.

Arroyo is the kind of guy who can disrupt a pitcher's rhythm. Beyond working good at-bats, he differs from the standard Mariners hitter in that he doesn't go up to the plate looking to pull everything. Left field is the righty swinger's power alley, but most of his batted balls go to center and to the right of center. He's gotten comps to Howie Kendrick, and the shoe fits.

The Mariners have clearly determined that it is time to let the kids play

Is Arroyo really more ready to play in the majors now than he was last Tuesday? Probably not. But at this point, the risk-reward ratio is dramatically different. Arroyo's development can only benefit from exposure in the majors, and it's not like the team's playoff odds can get any lower.

So, expect plenty of at-bats and field reps for Arroyo between now and the end of the season on September 27. For that matter, don't expect Montes to sit even against lefties once his hip is feeling better. The plan for Kade Anderson probably won't deviate from what it's been since he debuted on August 22, but who knows? The only goal that matters is not burning him out.

One way or another, all three of these guys were likely to factor into the Mariners' plans for the 2027 season. While that part hasn't changed, it's clearly time for them to get a leg up on proving they shouldn't have to try too hard to earn jobs next spring.

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