Their study of boxing is not limited to the present either. While they focus primarily on boxers after the year 1930, they are well-read and extremely knowledgeable about the old-timers that preceded these men, even as far back a the bare-knuckle fighters. I have experienced some challenging debates with Tom and Frank regarding several men in boxing history and, in some cases, I am hard-pressed to produce a decent argument in response to some of the points they emphasize.