Alex Rodriguez is going to have surgery to repair the torn meniscus in his right knee, and is expected to miss four to six weeks.
The Yankees say the slugging third baseman will be operated on Monday by Dr. Lee Kaplan at the University of Miami.
Rodriguez will likely be back in time for the final month or so of the season, when the Yankees expect to be in a race with Tampa Bay and Boston for the AL East and wild card.
Before Saturday's game, New York manager Joe Girardi revealed the injury to the leg Rodriguez uses to push off while swinging. An MRI on Friday showed a slight tear in the cartilage.
Rodriguez, who turns 36 later this month, has already pulled out of next week's All-Star game.