Padres pitcher Jason Marquis will miss the rest of the season with an elbow injury. (Dilip Vishwanat/Getty Images)
No decision has been made about surgery. "The doctor feels as though it's significant," Padres manager Bud Black said.
Marquis, 34, allowed six runs on eight hits with three walks over 5 1/3 innings in a loss to the St. Louis Cardinals in his last start on Friday.
Marquis was 9-5 with a 4.05 ERA in 20 starts this season, but went 0-3 with a 5.13 ERA over his last six starts.
"You look at the win-loss record and the overall ERA, though it has been climbing as of late, and we won a lot of games he started," Black said.