ST. LOUIS -- San Francisco 49ers tight end Vernon Davis is active against the St. Louis Rams after missing two of the previous three games with a back injury.
Davis was limited all week in practice and had been questionable.
Rams rookie guard Greg Robinson is expected to get his first start in Monday night's game in place of Davin Joseph. Robinson was the second-overall pick.
Running back Zac Stacy is active after being probable with a calf injury. He was a full practice participant Friday and Saturday.
Rams special teamer Chase Reynolds is inactive after he injured a hip in practice.
49ers right tackle Anthony Davis is inactive for the fifth time in six games after being questionable with a knee injury.
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