George Kirby has progressed to throwing bullpen sessions.

Fantasy Impact

Kirby opened the season on the 15-day injured list. If all goes well with his bullpen sessions, he'll advance to facing live hitters before starting a rehab assignment.

The Mariners placed George Kirby on the 15-day injured list.

Fantasy Impact

Kirby was able to resume throwing last week. He will have a chance to join the Mariners rotation towards the end of April.

George Kirby (shoulder) threw 20 times from 60 feet Friday and will stretch to 75 feet Saturday, per team updates, two weeks after a shoulder inflammation diagnosis.

Fantasy Impact

Kirby’s 20 throws at 60 feet Friday, post-biologics injection, advance to 75 feet Saturday, signaling progress from his right shoulder inflammation for the Mariners, with no debut timeline yet. The 27-year-old heals steadily. Fantasy managers in all leagues should stash him, banking on his elite arm for a midseason return to Seattle’s 2025 rotation if his ramp-up continues without hitches.

George Kirby (shoulder) played catch briefly with a trainer Friday, per team updates, his first throw since a March 7 right shoulder inflammation diagnosis.

Fantasy Impact

Kirby’s few minutes of catch Friday, post-March 7 shoulder inflammation, signal early rehab steps, eyeing a mid-April Mariners debut with no firm timeline yet. The 27-year-old progresses cautiously. Fantasy managers in all leagues should stash him, banking on his precision arm for a strong midseason return to Seattle’s 2025 rotation if his shoulder recovery stays on track.

George Kirby (shoulder) aims to start playing catch soon, per team updates, staying in Arizona for three more weeks of rehab after a March 7 shutdown for inflammation.

Fantasy Impact

Kirby, sidelined since March 7 with right shoulder inflammation and post-injection, eyes a catch start soon, targeting a mid-April Mariners return after rehab in Arizona. His timeline’s fluid. Fantasy managers in all leagues should roster him, expecting his ace-level skills to shine once back, though a mid-April debut means stashing him through early weeks.