Kirby, who has been out all season as he recovers from shoulder inflammation, made his first rehab appearance on Sunday for Triple-A Tacoma. His results looked good, but what happens next is the most important thing to see.

Mariners pitcher George Kirby, who has yet to make his season debut, will start for Triple-A Tacoma as he works his way back from a shoulder issue.

Mariners right-hander George Kirby, who was shut down in early March with shoulder inflammation, made his first rehab start Sunday with Triple-A Tacoma.