The Mariners have signed left-hander Rob Kaminsky to a minor league deal, according to his transactions tracker at MLB.com. The southpaw has been assigned to Triple-A Tacoma and will give the club some non-roster depth.
Kaminsky, 29, has a small amount of major league experience, having pitched for the Cardinals in 2020. He appeared in five games that year with a 1.93 earned run average in a small sample of 4 2/3 innings. He lost his roster spot later that year and has been limited to minor league deals in subsequent seasons.
For the most part, his minor league results have involved few strikeouts but lots of ground balls. From 2021 to 2023, he tossed 78 innings in the minors with a 4.96 ERA. His 21.4% strikeout rate in that time was subpar but he got opponents to hit the ball into the dirt around half the time.
This year, Kaminsky made two appearances for the Staten Island Ferry Hawks of The Atlantic League, tossing 6 2/3 innings. He struck out five but also allowed five walks. Last month, he retweeted some footage of himself pitching at Driveline, with his fastball seeming to get above 92 miles per hour and his secondary offerings in the mid-to-high 80s. In his brief big league stint, Statcast had his fastball averaging 91.6 mph, his knuckle curve at 84.9 mph and his changeup at 83.1 mph.
The M’s have had some bullpen injuries this year, with each of Matt Brash, Jackson Kowar, Gregory Santos and Gabe Speier on the injured list. Brash and Kowar each had Tommy John surgery and won’t be coming back this season. Tayler Saucedo is the only lefty in the big league bullpen at the moment. The Mariners are plenty familiar with Kaminsky as he was in their system the previous two seasons, so have tapped him for an extra left-hander in the minors.
A Lewis Brisbois scion.
They will need an impact reliever soon this is a window dressing.