The Athletics will recall Barnett from Triple-A Las Vegas to start Friday's game against the Guardians, Martin Gallegos of MLB.com reports.
Barnett owns a 7.08 ERA and 1.62 WHIP through 40.2 innings in the majors this season. He hasn't fared much better in four starts since returning to the minors in mid-August (6.97 ERA, 1.84 WHIP), though he delivered a nine-inning, two-run gem for Las Vegas his last time out Saturday. He'll be welcomed back to the big leagues by a Guardians lineup that's been trending upward while posting a .748 OPS over its last 10 games.