I would definitely not use my poker bankroll for sports betting. In fact, I've never been big on sports betting at all. Other than boxing, I wouldn't even make a casual bet between friends on sporting events. I tend to agree with one of my best friends on this subject, that it's hard to put my faith in somebody else's performance, especially when it comes to team sports where one or two players being a little off can affect the outcome of a contest even if the rest of the team performs well.