The Seattle Mariners will begin their ALDS matchup against the Detroit Tigers without one of their best arms. Bryan Woo, who has dealt with right pectoral inflammation since mid-September, was left off the Mariners ALDS postseason roster, a decision confirmed just hours before Game 1.

USA Today’s Bob Nightengale took to X (formerly known as Twitter), crediting The Seattle Times’ Adam Jude for first reporting the news , posting the following.

“Seattle Mariners ace Bryan Woo, who has been dealing with pectoral inflammation, is left off the ALDS roster, per @A_Jude .”

The injury timeline began on September 19, when Woo exited a start against the Houston Astros after five innings. He missed his final regular-season outing, and though he threw a bullpen session on October 2, the inju

See Full Page