Manager Mark Kotsay said Saturday that Oller will take on a bullpen role for the Athletics to begin the 2022 campaign, Martin Gallegos of MLB.com reports.
Oller was informed Friday that he'd made the Opening Day roster, and he'll serve as a multi-inning reliever to begin the year. The right-hander made eight starts at Triple-A Syracuse last season and posted a 2.45 ERA and 1.02 WHIP in 44 innings. He'll be one of the top options to fill in as a spot starter if needed.