Jadeveon Clowney ran an unofficial 4.47-second, 40-yard dash Monday morning at the NFL Combine.

That's fast. Enough speed to forget about Clowney's less-than-impressive 21 reps of 225 pounds on the bench press Sunday. The former South Carolina defensive end unofficially burned more speed than all but five running backs at the NFL Combine. His time is easily the best among defensive linemen.

NFL Network analyst Warren Sapp, a hall of fame defensive tackle with the Tampa Bay Bucs, couldn't believe Clowney's raw athleticism.

Get the full story on the Spur of the Moment blog.