Boxing champion Terence Crawford had the opportunity to participate in a big crossover fight against Conor McGregor . Crawford (40-0), a four-weight world champion in boxing, currently holds the WBA and interim WBO super welterweight titles. Former UFC lightweight champion McGregor (0-1) could have been on his resume, as he revealed there were once talks with the Irish MMA superstar. Rumors of a two-fight deal with McGregor, one boxing bout and one MMA fight, were recently floating around