Mariners reinstate righty Jackson Kowar from the 60-day IL

The Mariners announced that right-hander Jackson Kowar has been reinstated from the 60-day injured list. The 40-man roster had a vacancy due to right-hander Jesse Hahn being designated for assignment last week but is now full. To open an active roster spot, righty Logan Evans has been optioned to Triple-A Tacoma.

Kowar, 28, has been with the Mariners for over a year but will be making his team debut whenever he gets into a game. He was acquired from Atlanta in December 2023 but required Tommy John surgery in March 2024. He spent all of last year and the first few months of this year on the IL.

Prior to going under the knife, he had shown promise with a recent change in role. A starter for most of his career, he showed a velocity bump while moving to a relief role in 2023. He had averaged around 95.7 miles per hour with his fastball as a starter but got that up to 97 mph out of the bullpen. The results didn’t immediately click, as he had a 6.43 earned run average that year, as well as subpar strikeout and walk rates of 21.2% and 14.6%.

Still, the M’s clearly feel there are good ingredients to work with. After the Royals flipped Kowar to Atlanta as part of the Kyle Wright deal, the M’s grabbed him as part of the Jarred Kelenic deal. They kept him on the roster throughout the winter, when there’s no IL, so they’re surely hoping their patience will pay off now that he’s healthy.

Evans got called up about a month ago, making his major league debut as the M’s dealt with various rotation injuries. He generally performed well, with a 2.83 ERA over six starts. Looking under the hood, there are some less impressive numbers, such as a 17.4% strikeout rate. But as far as injury replacements go, the M’s have to be thrilled with what Evans gave them.

The rotation has been getting healthier of late. George Kirby is now off the IL. It seems like Bryce Miller and Logan Gilbert are nearing returns as well. The M’s could therefore have their ideal quintet shortly, with Luis Castillo and Bryan Woo the other two pieces. Evans has been bumped into a depth role for now, while Emerson Hancock could be next.