The NCAA men’s basketball tournament is a nationwide event, bringing sports fans together every March. The season-ending tournament is a culmination of 68 of the best teams in college basketball. All the rivalries, camaraderie and drama that comes with a National Championship is on the line in a single-game elimination tournament. And the best place to get in on all the action is Yahoo Sports Tourney Pick’em. Players can start filling out their brackets on March 13 with games begin March 17 -- all for a chance at $50,000!