Cleveland Browns starting defensive tackle Maliek Collins is out for the remainder of the season with a quad injury that will require surgery, coach Kevin Stefanski announced Monday.

Collins suffered the injury in the third quarter of Sunday's 26-8 home loss to the San Francisco 49ers . He left the field on a cart and was later ruled out for the rest of the game.

Collins was having arguably his best season in his first year in Cleveland, recording a career-high 6.5 sacks. Collins has also been a valuable mentor to many of the team's young defensive linemen, including No. 5 overall pick Mason Graham .

The Browns signed Collins, 30, to a two-year deal worth $20 million last year.

Stefanski also announced that right guard Wyatt Teller is week-to-week with a calf injury and won't

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