Mariners designate Casey Lawrence for assignment, select Jesse Hahn

The Mariners announced that they have designated right-hander Casey Lawrence for assignment. Fellow righty Jesse Hahn has been selected to the roster in a corresponding move. Bob Condotta of The Seattle Times reported the moves prior to the official announcement.

MLBTR readers should not be surprised to see Lawrence bumped off the roster again. The Mariners selected his contract yesterday, the fourth time this year they have done so. In each instance, Lawrence pitched in a game or two before being designated for assignment. The first two resulted in him clearing waivers, electing free agency and re-signing with the M’s on a new minor league deal. The third time they put him on waivers, the Blue Jays claimed him. That club also used him once before putting giving him the DFA treatment. That led Lawrence back to the Mariners on yet another minor league deal.

Yesterday, Lawrence served as the bulk pitcher in a bullpen game, which was necessary due to rotation injuries. The M’s have had George Kirby and Logan Gilbert on the injured list for a while and Bryce Miller recently joined them. That leaves them with a four-man rotation core of Luis Castillo, Bryan Woo, Logan Evans and Emerson Hancock.

Yesterday, Casey Legumina officially started the game but went just one inning as an opener. Lawrence then came in and tossed five innings, allowing one earned run. That was enough for a tough-luck loss as the M’s fell to the White Sox 1-0.

Based on the circumstances, it always seemed likely that Lawrence would be bumped off the roster yet again and that has indeed come to pass. Per Condotta, Kirby will be reinstated from the IL to start tomorrow’s game, bringing the M’s back to a five-man rotation.

Lawrence will be placed on waivers again in the coming days. Based on recent history, it’s fair to assume that he will clear and then return to the M’s on another minor league deal. Though it’s also possible that some club in need of a fresh arm puts in a claim, as the Jays did a few weeks back. After yesterday’s outing, Lawrence now has a 4.08 earned run average in 17 2/3 innings on the year. He has a career ERA of 6.42 in 141 2/3 innings spread over five seasons.

Hahn, 35, gets a roster spot for now. In a similar situation to Lawrence, he had his contract selected earlier this year but made just two appearances before being designated for assignment. He logged four scoreless innings in those appearances before getting the DFA treatment. He cleared waivers, elected free agency and re-signed with the M’s on another minor league deal. Shortly after re-signing, he landed on the minor league injured list but he has evidently returned to health. He’s made four scoreless Triple-A appearances in the past two weeks.

The M’s will need to open an active roster spot for Kirby’s activation tomorrow. Perhaps Hahn is slated for a short stay but they could also opt to send down Troy Taylor, who has options and is struggling, with a 12.15 ERA so far.

Hahn has a 4.17 career ERA in 315 1/3 big league innings but this is his first season with major league work since 2021. A shoulder injury cost him the 2022 and 2023 seasons and then he was stuck in the minors last year. As mentioned, he’s been putting up zeroes so far in 2025 but in a small sample.

Photo courtesy of Steven Bisig, Imagn Images