Milwaukee Brewers first baseman Corey Hart needs surgery on his left knee and will miss the remainder of the season, manager Ron Roenicke told reporters prior to Friday's game in Pittsburgh.
Hart, 31, hasn't played all season after undergoing right knee surgery in January. Hart went to Los Angeles on Wednesday to get a second opinion on his left knee from Dr. Neal ElAttrache.
ElAttrache determined surgery was necessary, which will give Hart two surgically repaired knees.
A two-time All-Star, Hart hit .270 with 30 home runs and 83 RBI last season.
Hart discovered the injury in his right knee while going through offseason workouts. In January, Brewers team physician William Raasch performed surgery to debride the right knee joint surface and repair a small meniscus tear.
At the time of the surgery, Hart's timetable was set sometime in May, but that has been pushed back numerous times.
The Brewers have received minimal production out of first base this season, as their first basemen hold the worst batting average in Major League Baseball at .187. Milwaukee has just eight home runs and 41 RBI out of a run-producing position.
Hart is in the final year of his contract with the Brewers and will enter free agency coming off a lost season.
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