In a seismic shift in the boxing business landscape, Top Rank promoter Bob Arum closed a deal with Showtime and sister network CBS to handle the pay-per-view fight between pound-for-pound king Manny Pacquiao and Shane Mosley -- instead of HBO -- multiple sources told ESPN.com on Friday. Pacquiao, boxing's biggest star, defends his welterweight title against former champ Mosley on May 7 at the MGM Grand in Las Vegas. Pacquiao (52-3-2, 38 KOs) and Mosley (46-6-1, 39 KOs) have never fought with Showtime's involvement and both have fought all of their numerous significant fights on HBO or HBO PPV. Read more: http://sports.espn.go.com/sports/boxing/news/story?id=6046384
