Some white american athletes that could have been great boxers?

I'd agree with Drew Brees maybe just a little, considering that he trains in boxing during the off season to stay in shape but even thats a reach. Steve Nash definetly wouldnt be a great American white champion for the simple reason that he isnt American, he's a South African born Canadian citizen, i also doubt the entire NHL would be great white American boxers because there are some African-American hockey players in the NHL so i doubt they'll ever be given the chance to be great white American boxers, do you see where im going with his answer? to say it bluntly, think things through before asking questions like this. Im just saying.