Contenders

Summary
One of David's childhood friends is accused of murder while sparring in preparation for an All-Out Fighting (MMA) bout, and Charlie has a contest of his own trying to defend Larry's chair in a Texas Hold 'em qualifier.

Main

 * Rob Morrow as Don Eppes
 * David Krumholtz as Charlie Eppes
 * Judd Hirsch as Alan Eppes
 * Alimi Ballard as David Sinclair
 * Peter MacNicol as Larry Fleinhardt
 * Navi Rawat as Amita Ramanujan
 * Diane Farr as Megan Reeves
 * Dylan Bruno as Colby Granger

Guest

 * Aya Sumika as Liz Warner
 * Michael DeLorenzo as Nacio Duque
 * Maximiliano Hernández as Rico
 * Jon Curry as Detective (credited as Jon B. Curry)
 * Wendell Pierce as William Bradford
 * Vincent Laresca as Che Lobo
 * Taylor Gray as Jo Santiago
 * Jason Chanos as Maloney

Trivia

 * Beyond the immediate and literal, the title appears designed to evoke Marlon Brando's "I coulda bin a contender, Charlie" speech from On the Waterfront.