Luis Castillo reached 1,500 career strikeouts on May 19, 2026, becoming the latest pitcher to achieve this milestone. The Seattle Mariners right-hander accomplished the feat in his 10th major league season since debuting in 2017.
Castillo began his career with Cincinnati, appearing in 137 games from 2017 through mid-2022 before joining the Mariners in a trade during the 2022 season. He has appeared in 106 games with Seattle from 2022 through 2025.
Across his MLB career as a whole, Castillo has compiled an 85-89 record with a 3.64 ERA and 1,540 strikeouts over 253 games and 1,457.0 innings pitched — figures that span both organizations.
With 129 innings remaining to reach 1,500 career innings pitched, Castillo could reach 1,500 career Innings Pitched this season. The milestone represents 10 seasons of major league service across two organizations since his 2017 debut.