if what his brother says is completely accurate, mark is one dumb bastard. his brother claims he introduced him to a steroid dealer... with all the money he has you think he would have just asked his brother to get him some shit and maybe buy him some gear as well, anything to insulate him from people that could have dirt on his career.
then again his brothers judgement doesn't sound the greatest either. gets 150k for an accident where he loses his eye, and starts buying steroids with his new "wealth". brutal investment skills.