Jimenez was informed Sunday that he's made the Athletics' Opening Day roster, Scott Bordow of MLB.com reports.
Jimenez made two relief appearances for the Giants in 2020 but spent the entire 2021 campaign at Triple-A Buffalo and posted a 2.22 ERA and 1.22 WHIP in 44.2 innings across 39 appearances (one start). After tossing 4.1 scoreless innings across five Cactus League outings this spring, the right-hander will pitch out of the major-league bullpen to begin the year.