The Giants announced that pitcher Johnny Cueto will undergo Tommy John surgery on Thursday.
The procedure will be done by Dr. Neal ElAttrache at the Kerlin Jobe clinic in Los Angeles. Players are normally out more than a year after Tommy John surgery. It's possible Cueto won't pitch in a major league game until the 2020 season.
Cueto made his fourth start since returning from the disabled list on Saturday. He was placed on the DL in May because of inflammation in his pitching elbow, which was later determined to be a partially torn ulnar collateral ligament.