Errol Spence Jr. (12-0, 10KOs) winds down his training camp with sparring against middleweight Tony Mack today at Maple Avenue Boxing Gym in Dallas TX. The undefeated welterweight prospect and 2012 Olympian Spence will be featured as the main event on Shobox: The New Generation, when he faces battle-tested veteran Ronald Cruz (20-3, 15KOs), on Friday June 27th at 9:30pm ET/PT on Showtime.