LIST: Boxing’s oldest champions Manny Pacquiao hopes to join

As the old sports adage goes, Father Time is undefeated. But every once in a while, someone walks in and defies the odds. Manny Pacquiao will attempt to do just that when he steps into the ring, coming off a four-year retirement, on July 19 against WBC welterweight champion Mario Barrios. At 46 years old,