The Athletics optioned O'Loughlin to Triple-A Las Vegas on Sunday.
The 24-year-old southpaw received his first big-league call-up May 25 and tossed seven shutout innings over his three appearances out of the Oakland bullpen. After covering 3.1 frames in relief in Saturday's 7-0 loss to the Blue Jays, O'Loughlin wasn't expected to be available for at least the next couple of the days, so Oakland will swap him out of its bullpen for right-hander Michel Otanez, whose contract was selected from Las Vegas in a corresponding move.
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Athletics' Jack O'Loughlin: Moves up to big leagues
Rotowire
The Athletics selected O'Loughlin's contract from Triple-A Las Vegas on Saturday, Ken Rosenthal of The Athletic reports.
O'Loughlin signed a minor-league deal with the A's during the offseason, and he has put up a 5.12 ERA and 1.62 WHIP across 38.2 innings in Triple-A. Despite his poor performance, he'll join the big-league roster to provide a fresh arm to Oakland's pitching staff -- likely as a multi-inning reliever.
