By Evan Bleier A pair of former star running backs who both spent time at the top of fantasy football draft boards during their NFL careers are set to face off in a heavyweight boxing match now that their playing days seem to be close to over. Adrian Peterson, who split time between the Titans and Seahawks last season, and Le’Veon Bell, who was with the Ravens before latching on with the Bucs, will face off in the ring at an event called Social Gloves 2. The main event will feature YouTube star Austin McBroom taking on fellow YouTuber AnEsonGib, and rapper Blueface will fight former NBA player…