Mariners prospect who fell off radar is now showing he can be uniquely valuable

Michael Arroyo has seen a steady rise in his status ever since the Mariners made him one of three top 50 international signing prospects in 2022. However, his progress had hit a speed bump when we checked in on him during last month. Now though, it seems all it took was a stint on the Injured List to get him back on a smoother road to success.

It might seem strange to doubt a player who, according to MLB Pipeline, is the No. 45 prospect in baseball. And yet Arroyo was struggling in Double-A Arkansas prior to going on the IL on May 17 with a hamstring issue, at least by his standards. For someone with a reputation built around being a stocky power hitter, a .254/.325/.401 slash line, .762 OPS and 102 wRC+ through 36 games wasn't considered good enough.

There was the concern that moving Arroyo from second base to left field was fast becoming a failed experiment which was negatively impacting his bat. For example, as SoDo Mojo's Zachary Rymer pointed out, the 21-year-old had a significantly higher K% and lower multi-hit games rate since going to the outfield. However, any issues seem to be subsiding since he returned to the Arkansas lineup.

Arroyo's bat has been hot since coming back, with a .333/.396/.476 slash line, .872 OPS and 143 wRC+ in 10 games. The highlight of this was a four-hit performance that drove in five RBI in a 12-7 win versus Corpus Christi, with both numbers being season-highs. In a general sense, his success is even more impressive when considering he plays half of his games at Dickey-Stephens Park, which is notorious for not being hitters-friendly:

As for the defensive side of things, sure there's been some understandable hiccups since moving to left field, but Arroyo hasn't actually been terrible. Which brings us to the question of what the Mariners should do with him.

Do they hold onto him and commit to him being Randy Arozarena's replacement next season, or sell high in a trade and let another team figure out his defensive home?

The challenging decision on Michael Arroyo's future should be viewed through a positive mindset

In truth, it's hard to answer at this stage and maybe it's simply a case that either path is fair game. It also depends what kind of return assets Arroyo can conjure up in any potential trade, but either way he's a good right-handed hitter and those are very hard to find at the moment.

We don't say this lightly either, with right-handed hitters producing a collective 95 wRC+ in 2026 compared to a 108 wRC+ by left-handed bats. This is the worst season for right-handed hitters in a long time, notably in that their collective .385 slugging percentage is the lowest since 1992.

What does make the decision more complicated now, is the form of Arozarena. He's been one of the Mariners' most consistent offensive threats this season and leads the team with a 2.6 bWAR that easily projects to a career-high 6.1. It has long been assumed this is his final year in Seattle, but he's now making it harder for the M's to just let him walk.

Ultimately, do the Mariners want to keep a more expensive but known commodity, or go with an unproven cheaper option with a high ceiling? In fairness to them, the decision might be taken out of their hands, because we suspect Arozarena is ready to move on to pastures new. Either way, it's up to Arroyo to continue trending in the right direction and boost his value, to give the M's front office the positive kind of problem in deciding his future.

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