Manny Pacquiao and Floyd Mayweather spent much of the weekend trading barbs and increasing speculation that boxings two biggest stars will soon agree to a mega-bout. Accused by many of avoiding Pacquiao for years, Mayweather provided a flurry of jabs at the Filipino star and called him out for a May 2 bout during an interview with Showtime Boxing on Friday.Pacquiao, who is coming off a one-sided win over Chris Algieri,...