Watch: McCaffrey finally makes debut at Panthers minicamp

Running back Christian McCaffrey made his debut at Carolina Panthers minicamp Thursday, the final day of practice before the team breaks for the summer.

A somewhat bizarre NFL rule prevented McCaffrey from practicing any earlier. Stanford, where McCaffrey attended college, is a quarter-system school and NFL rookies are prohibited from joining their teams until their school's final exams are over, a milestone Stanford only hit on Wednesday.

The good news is that the rule doesn't apply to rookie minicamps and McCaffrey was permitted to practice with the Panthers for a few days following the NFL draft. He's probably behind the curve a bit, but it could be much worse.