Cardinals wide receiver Larry Fitzgerald left the team's loss to the 49ers on Monday night with a knee injury. He sprained his right knee in the second half and is scheduled to have an MRI on Tuesday. Fitzgerald returned after suffering the injury, but finished with just two catches for 22 yards. "When he hurt his knee, we thought that there was a big scare, it might be something long-term," coach Ken Whisenhunt said. "But obviously it was encouraging to see him come back. We'll get him checked out."