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. “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. While fans were eager to see Woo lead the rotation, the Mariners made a forward-looking call prioritizing both health and roster flexibility. In a high-stakes five-game series, one injury decision could shift the entire outcome.