it just so happens that i play football in real life, and you got everything very messed up.
1. no chance is a halfback faster than a wide reciver. any wide reciever on my team can beat a hlf back in a race.
2. corner backs are as fast, if not faster, than WR (wide reciever)
3. linebackers are not slow, fat, or dumb. i play linebacker. i run a 5.18 forty time, weigh 130 lbs, and get B's or better in all my classes.
tldr; he messed up and failed.