Boxers who taught other boxers things or improved their skills?

Maurice Harris was once a sparring partner of Lennox Lewis....he said that Lennox taught him a lot

 

James Toney says that his fights with Mike McCallum made him a complete fighter

 

George Benton. He was an absolute badness of a fighter in a very tough era and went on to train fighters under Eddie Futch in the 70's and under the Duva's in the 80's, 90's and 2000's. He worked with three of my all time favorite fighter's Leon Spinks, Evander Holyfield and my Mike McCallum. He was with Spinks when he beat Ali and with Holyfield thru his prime and helped develop McCallum into the defensive wizard he became.

 

Angelo Dundee said that Muhammad Ali would study Luis Rodriguez in the gym ...and copy his moves

 

Johnny Tapia learned how to be a great body puncher by watching Mike Tyson

 

Timothy Bradley watched a lot of tapes of James Toney

 

Mike Mccallum watched a lot of tapes of Sugar Ray Robinson