Jackson Steensma: live stats, tool grades and Baseball Things scouting coverage of the Mariners pitcher.
Jackson Steensma spent 2026 in the Seattle Mariners system, pitching in 15 games (12 starts) at Single-A Inland Empire. The right-hander threw 43⅓ innings with a 4.57 ERA, striking out 61 (34.9 percent of batters) and walking 10 (5.7 percent).
Baseball Things podcast: why the Seattle Mariners should consider trading Logan Gilbert, blockbuster prospect deals and Ryan Sloan’s value.
Baseball Things podcast: the Seattle Mariners' third base prospects, how the defense gets better, and a call on every arbitration case.
J.P. Crawford has provided leadership and a steady presence on the club's roster, but time may have just run out on the former first-round pick.
Baseball Things podcast: Jason A. Churchill names three Seattle Mariners players who should be on the trade block this offseason.
