: Features his legendary thunderous right hand and undefeated stamina. : Employs calculated power and devastating combinations. Jack Johnson

This is the cornerstone of the DLC, adding five of the greatest heavyweight champions to the roster: Jack Dempsey : Known for his aggressive "Manassa Mauler" style. Rocky Marciano

This pack introduces "Old School Rules," which significantly alters gameplay mechanics to simulate 19th-century prize fighting. Electronic Arts Home Page

The final piece of the initial DLC was the Alternate Weight Class Pack, a direct response to community requests. For , this pack added eight alternate versions of existing fighters in new weight classes, allowing for fresh fantasy matchups. The pack included: