Marcus,
You are an extremely talented football player. But lately you are behaving like a complete a-hole. Intentionally stomping on another player during a game? (See story.) What were you thinking? Oh wait. You probably weren’t thinking.
And the off-field antics? (See this story, which includes a nice sidebar of the run-ins with the law.) Marcus, you are not yet famous enough to be able to get away with this crap. Do you really think this behavior will help your draft position? Teams are (hopefully) wising up to these destructive behaviors and avoiding these types of players altogether.
Good luck in the draft,
Steve