The Mariners placed Luis Castillo on the 15-day injured list, retroactive to September 9, with a left hamstring strain. GM Justin Hollander told reporters this evening that the strain is of a Grade 2 variety. Seattle also transferred reliever Yimi García from the 15-day to the 60-day injured list, ending his season. Catcher Seby Zavala was selected onto the 40-man roster.
Castillo exited his start against the Cardinals on Sunday after three innings because of the injury. He went for imaging yesterday. That revealed the strain, which is evidently of moderate severity. Ryan Divish of the Seattle Times tweets that Castillo received a platelet-rich plasma injection and is hopeful of returning when first eligible.
That may well be determined as much by how the team plays over the next two weeks as by Castillo’s recovery. The M’s are holding onto faint playoff hopes. They’re tied with the Tigers and Red Sox at three games back of the Twins for the American League’s last Wild Card spot. Seattle is 4.5 games behind the Astros in the AL West.
Castillo would first be eligible to return on September 24. There’d be five games left in the regular season — two at Houston and a three-game set at home against the A’s. Seattle would surely need to make up ground on either the Twins or Astros before then to have any hope of a playoff berth. If they don’t do so, there’d be little reason to get Castillo back before the end of the year.
It’s the first injured list stint in two years for the three-time All-Star. Castillo hadn’t missed a start since the M’s acquired him at the 2022 deadline. He pitched 11 times down the stretch that year and made 33 appearances last season. Castillo is tied for the MLB lead with 30 starts this year. He owns a 3.64 ERA with a 24.3% strikeout rate across 175 1/3 innings. While this has been a slight step down from last season — when he finished fifth in Cy Young balloting — Castillo remains one of the more valuable starters in the game. Emerson Hancock will probably take his rotation spot alongside George Kirby, Logan Gilbert, Bryan Woo and Bryce Miller.
Seattle also loses one of their top relievers for the year. García has been shut down from throwing after experiencing elbow soreness during a recent bullpen session, the team announced (relayed on X by Daniel Kramer of MLB.com). The right-hander has been on the IL since August 24 due to elbow inflammation. García, an impending free agent, has been on the IL twice this year with elbow problems.
García had pitched very well for the Blue Jays earlier in the season. He turned in a 2.70 ERA with a 36.5% strikeout rate across 30 innings before the M’s acquired him in a deal sending rookie outfielder Jonatan Clase to Toronto. That didn’t pan out for the Mariners. García managed only nine innings in a Seattle uniform and allowed six runs. There’s no indication he’ll need any kind of surgery, but a forearm injury is a frustrating end to what had been shaping up as a strong walk year for the veteran righty.
Zavala returns to the MLB roster for his third stint of the season. The out-of-options catcher has hit .154/.214/.282 in 18 games. He’s hitting .188/.325/.376 across 33 appearances with Triple-A Tacoma. Zavala can work as a third catcher behind Cal Raleigh and Mitch Garver for the time being. It may be a short stay on the roster, though, as Seattle could jettison a position player to add a 14th pitcher to the active roster once they need a fifth starter this weekend.