There’s a bit more clarity on the state of the Seattle Mariners’ pitching staff now that they’re a game into the ALCS against the Toronto Blue Jays.

Bryce Miller certainly helped, giving Seattle a stellar six-inning outing in their Game 1 win on short rest and just two days after the Mariners had to cover 15 innings in Game 5 of the ALDS.

Salk: The secret to Bryce Miller’s dominant ALCS start for Mariners

And then just hours before the 2:03 p.m. first pitch of Game 2 of the ALCS, the Mariners announced their starters for Game 3 Wednesday and Game 4 Thursday when the series shifts back to Seattle’s T-Mobile Park.

Game 3 for the M’s will belong to George Kirby, who started Seattle’s ALDS-clinching win over the Detroit Tigers last Friday. Game 4 will be started by Luis Castillo, who earned the win in last Friday’s game by throwing the final 1 1/3 innings for Seattle in his first MLB relief appearance.

George and La Piedra got next. #SeizeTheMoment pic.twitter.com/iLnohxXE7R

— Seattle Mariners (@Mariners) October 13, 2025

As for a potential Game 5 this Friday in Seattle, the possibility remains open for 2025 All-Star Bryan Woo to make his postseason debut. He hasn’t pitched since leaving a Sept. 19 start in Houston early with right pectoral inflammation, but he was included on the ALCS roster and threw a live batting practice from the mound at Toronto’s Rogers Centre before Monday’s game.

“It felt good. It felt good to get back out and be on a good mound again, so, you know, all positives,” Woo said to reporters after his throwing session. “… I was able to treat it like real at-bats, mix everything, kind of sequence and everything like I wanted to. So yeah, all good.”

Mariners insider Shannon Drayer of Seattle Sports was on hand for Woo’s throwing session in Toronto. Click here and here for some video, and watch the final at-bat of the session below.

Final at bat. pic.twitter.com/McvwmtNPdz

— Shannon Drayer (@shannondrayer) October 13, 2025

Logan Gilbert, another usual starter who came out of the bullpen to pitch multiple innings in the ALDS clincher, is Seattle’s scheduled starter for Game 2 of the ALCS on Monday. Radio coverage on Seattle Sports will begin at noon with an extended pregame. The TV broadcast will be on FOX.

More Seattle Mariners ALCS coverage

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• Cal Raleigh burns Blue Jays again with HR No. 62 in ALCS Game 1
• Five reasons M’s-Blue Jays ALCS has ingredients for baseball bedlam
• Full ALCS Schedule: Seattle Mariners vs. Toronto Blue Jays