CLEVELAND -- Bills running back C.J. Spiller is scheduled to have an MRI on Monday on his left shoulder, which he injured during Sunday's 24-14 win against the Browns, a league source told ESPN NFL Insider Adam Schefter.
The source said Spiller's collarbone is intact, and doctors don't believe he will be sidelined much beyond next week. The belief, according to the source, is he sprained a shoulder joint.
Nevertheless, Spiller won't play in Week 4 against the Patriots, coach Chan Gailey said after Sunday's game.
"I don't believe it's long, long term," Gailey said. "If he missed a week that's long for me. He's going to be out for sure this week and then we'll see."
The NFL's leading rusher entering Week 3 was hurt as he was tackled after catching a short pass and picking up 25 yards. Spiller was in obvious pain as he stayed on the ground for several minutes before he was helped to his feet by trainers. He grasped his left arm as he walked off the field before being carted to the locker room for further evaluation and treatment.
The Bills announced late in the second quarter that Spiller would be back.
Spiller, who has been filling in for the injured Fred Jackson, came in averaging 10.1 yards per carry and leading the league with 292 rushing yards. He scored on a 32-yard screen pass in the first quarter to give the Bills a 14-0 lead. With the TD, Spiller has scored a touchdown in six consecutive games, the longest streak by a Buffalo player since Thurman Thomas' six-game streak in 1990.
Tashard Choice replaced Spiller, who had gained 16 yards on four carries and caught two passes for 42 before he was injured.
Information from ESPN NFL Insider Adam Schefter and The Associated Press was used in this report.