Bantamweight Shurretta Metcalf’s boxing journey didn’t begin in Olympic gyms or under bright lights-it started in nightclubs, where cash was tossed into the ring as she fought for survival and respect. Now, the Dallas-based fighter Metcalf stands on the verge of a career-defining moment: a rematch for the IBF bantamweight world title against three-time champion Miyo Yoshida on Wednesday at The Theater at Madison Square Garden, broadcast live on ProBox TV.