also just though of some more
pool
table tennis
rowing
racing

it think you get the point there is a ton of so called sports that could be a endless debate.

here is an article i found on espn. com if you want to read.

ESPN.com: Page 2 : Does poker qualify as a sport?

and a usa today article too.

USATODAY.com - Popularity of poker begs question: Sport or not?