Starting pitcher Jason Marquis will miss the remainder of the season for the San Diego Padres with ulnar collateral ligament damage in his right elbow and is expected to need Tommy John surgery before his pitches again.
Marquis was placed on the 15-day disabled list with a right elbow strain on Sunday.
In a corresponding move, the club recalled right-handed relief pitcher Miles Mikolas from Class AAA Tucson.
The move to place Marquis, 34, on the DL was retroactive to Saturday. He was injured during his Friday start against the St. Louis Cardinals in which he went 5 1/3 innings and had no strikeouts. He was 9-5 with a 4.05 ERA this season.
Tyson Ross, who is 0-4 with a 3.60, will take Marquis' spot in the rotation, taking the mound Tuesday.