BALTIMORE (AP) — Orioles third baseman Manny Machado has undergone surgery to repair a torn ligament in his left knee.

Monday’s operation was performed in California by Dr. Neal ElAttrache, according to the team.

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The 75-minute procedure included an arthroscopy and open reconstruction of the medial patellar femoral ligament. A hamstring tendon was used to graft a replacement for the ruptured ligament.

Recovery time is estimated to be around six months.

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Machado, 21, played in every game this season before the injury, which occurred on Sept. 23 when he stepped awkwardly on first base in a game at Tampa Bay.

A first-time All-Star this season, Machado hit .283 with 14 homers, 71 RBIs and 51 doubles.

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