Seattle Mariners All-Star pitcher Bryan Woo, who has been sidelined the past two weeks with pectoral inflammation, was left off the team's roster for its American League Division Series against the Detroit Tigers.

Woo, 25, left his start vs. Houston on Sept. 19 while warming up for his sixth inning of work. He threw his first bullpen session on Thursday but was limited to 15 pitches at 80 percent to 90 percent intensity, per The Seattle Times.

"Obviously, you don't want to take huge, huge jumps (in intensity)," Woo said after his bullpen. "You've got to be smart with it. Hopefully we just keep progressing like we have been."

There remains optimism that Woo will be able to pitch in the next round should Seattle win the best-of-five ALDS. That would be notable for the Mariners considering

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