How Mayweather bounces back after a loss to Pacquiao will determine his true greatness

By Sizzle JKD: Muhammad Ali was 56-5. Joe Frazier was 32-4. George Foreman was 76-5. Lennox Lewis was 41-2. Sugar Ray Leonard was 36-3. Roberto Duran was 103-16. Marvelous Marvin Hagler was 62-3. Tommy