The St. Louis Rams are confident that Sam Bradford did not sustain a serious knee injury on Saturday.

"I can't speculate but it appeared just to be a hyperextension of the same knee," Jeff Fisher said. "He's walking around fine inside right now. That's all I can tell you."

A league source told ESPN NFL Insider Adam Schefter that initial tests did not show any damage to Bradford's surgically repaired left ACL, adding that the Rams "dodged a bullet."

Bradford will undergo an MRI no later than Sunday, Fisher confirmed Saturday night.