ST. LOUIS (AP) St. Louis Cardinals left-hander Marco Gonzales will have season-ending Tommy John surgery.
General manager John Mozeliak announced the decision Wednesday, and said he expects Gonzales to have the operation Friday.
Gonzales injured his elbow during spring training.
The 22-year-old Gonzales was limited to one start for the Cardinals last season because of shoulder problems.
Gonzales was 4-2 with a 4.15 ERA in 10 games as rookie in 2014 after being selected by the Cardinals in the first round of the 2013 draft. He continued his strong play in the postseason, going 2-1 with a 4.50 ERA in six games.
The standard recovery from Tommy John surgery is 12-15 months.