Broncos running back Willis McGahee believes that Tim Tebow has done all he needs to do in order to establish himself as an NFL quarterback. Tebow had a passer rating of 125.6 in Denver's overtime playoff win over Pittsburgh on Sunday afternoon. "He showed he's a quarterback in the NFL, case closed," McGahee said. "They say he couldn't throw. They said we wouldn't be able to run the ball on them. We did that. I wonder what they're going to say next week."