Coach: Your roommate and the captain of the team reported that you have many bad words for me in your sleep!
So do you abuse me in your sleep!
Football Player: Coach, It is just not true!
Coach: What is not true, I trust the captain and I am asking this in front of him!
Football player: Coach, It is untrue that I was sleeping!
This joke is included in the Black Book of Jokes. You can order it from here.