Joey Votto will undergo arthroscopic knee surgery tomorrow to repair a torn meniscus in his left knee.

He is expected to miss three to four weeks.

A roster move will be made tomorrow.

Votto originally injured the knee in San Francisco, sliding into third base June 29. He left the game the next day and missed two more games with what was described at the time as inflammation.

Votto struggled at the plate since returning. He was 1-for-13 before going 2-for-3 Sunday night. He was 8-for-31 (.258) overall since returning from the two games out of the lineup.