Jack was present at the Premier Boxing Champions open workout for Saturday's card.
Fighters who worked out at the event that are featured on Saturday's Premier Boxing Champions on NBC card included Adrien "The Problem" Broner (30-1, 22 KOs), "Showtime" Shawn Porter (25-1-1, 16 KOs) and Errol "The Truth" Spence Jr. (16-0, 13 KOs). Coverage on NBC begins at 8:30 p.m. ET/5:30 p.m. PT. Broner, who considers Mayweather a mentor and "big brother," has trained at the Mayweather Boxing Club for weeks, per Mayweather's suggestion.
Tickets for the Saturday's event, which is promoted by Mayweather Promotions in association with TGB Promotions, are priced at $400, $300, $100 and $50, not including applicable service charges and taxes are on sale now. To charge by phone with a major credit card, call Ticketmaster at (800) 745-3000. Tickets are also available at www.mgmgrand.com or www.ticketmaster.com.