Feeley, starting ahead of rookie Sam Bradford, was hit by Browns linebacker Chris Gocong on a third-down pass. Feeley completed the throw but came up holding his right wrist. He stayed in the game and threw a 9-yard TD pass to tight end Daniel Fells, giving the Rams a 7-0 lead.
Feeley was looked at by trainers when he came to the sideline and was then taken to the Rams' locker room.
Feeley may have banged his thumb on Gocong's helmet. Feeley had his thumb and elbow wrapped after the game. He said X-rays on both were negative and expects to play Thursday against New England.
Bradford came in for St. Louis' next drive and nearly threw an interception on his first attempt.
Information from The Associated Press was used in this report.