O'Malley (foot) is back in the lineup against the Royals on Thursday, Bob Dutton of The Tacoma News Tribune reports.
O'Malley was hit by a foul ball Monday, but came in for two at-bats during Tuesday's contest. He sat out Wednesday's game, but will be back in the lineup Thursday in center, batting ninth in the order. O'Malley is hitting .221 with five RBI during 68 at-bats this season.