Three Seattle Mariners’ Prospects That Have Disappointed This Year

Mariners prospect Damon Casetta-Stubbs — SEATTLE, WA – JULY 09: The Seattle Mariners’ logo is painted in throwback colors for their Sunday day game against the Oakland Athletics at Safeco Field on July 9, 2017 in Seattle, Washington. The Seattle Mariners beat the Oakland Athletics 4-0. (Photo by Lindsey Wasson/Getty Images)

#1: Mariners Low A-Ball RHP Damon Casetta-Stubbs – 6 GS, 11.52 K/9, 6.12 BB/9, 6.84 ERA, 6.39 FIP

It has been a bit of a nightmare 2021 campaign for the 21-year-old Casetta-Stubbs. The 11th round pick of the Mariners in 2018, the organization was hoping to get an arm with big-time upside and raw talent that could develop down the road.

But that hasn’t happened. Casetta-Stubbs is now in his third year with the organization, and control issues are still lingering in a big way. The BB/9 rate is way too high for a near 22-year-old arm still pitching in Single-A. The strikeout numbers are good and have been good throughout his career, but it’s not enough to counter the walk issues.

The one silver lining for Casetta-Stubbs is that he isn’t getting hit all that much. Opponents are only hitting .219 against him, which does offer hope that if he can limit the walks, he can still be effective. The issue is, there isn’t much to suggest that will be the case. It’s been his biggest problem since making his pro debut, and unless something changes in a big way, it’s hard to see him making it much further in the organization.

Like with Then, it is possible the organization tries to move Casetta-Stubbs to the bullpen but it would like a last-ditch effort to try and find something that works for him.

#1: Mariners Low A-Ball RHP Damon Casetta-Stubbs – 6 GS, 11.52 K/9, 6.12 BB/9, 6.84 ERA, 6.39 FIP

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