Is poker a sport? Athletes weigh in on topic

Is poker a sport? It's an oft-debated question. In Douglas Tirola's documentary "All In: The Poker Movie," some big names from sports whose status is unquestioned -- boxing's Evander Holyfield, MMA's Chuck Liddell and baseball's Jose Canseco and David Wells -- give their opinions in this exclusive clip from 4th Row Films.

"All In" is available through Video on Demand on iTunes starting today.