Sean Manaea has the right to opt out after this season with the Giants and become a free agent next fall.
Oakland, which meets the Yankees in Wednesday's AL wild-card game, doesn't have any household names -- at least not yet.
How is Oakland winning with Edwin Jackson, Brett Anderson and any one of a dozen other pitchers on its starting staff?
A's lefty Sean Manaea, who was 12-9 with a career-best 3.59 ERA and 108 strikeouts, will miss the rest of the season and possibly 2019 after having surgery.
A's manager Bob Melvin said Tuesday that left-hander Sean Manaea has been diagnosed with rotator cuff tendinitis and his status for the rest of the season is uncertain.
Oakland Athletics left-hander Sean Manaea was placed on the 10-day disabled list with a left shoulder impingement before Sunday's game against the Twins.
