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.

Working his way back from a shoulder issue that has delayed his season debut, Seattle Mariners right-hander George Kirby is slated to begin a rehab assignment on Sunday with Triple-A Tacoma.