This is a good matchup for Graham. He's one of the few fighters who'd have an advantage over Johnson in speed, and I feel like his hectic style would frustrate the much more textbook Johnson. The guys who beat prime Graham were good ring generals, consistent from round to round, and/or capable of testing/caving in Graham's chin. I've always found Johnson a bit lacking in those regards.
Reggie might have too much for Bomber. He can box and put his pumches together well and while he isn't as quick as the Bomber he isn't far behind. Close decision for Reggie.
