Terence Bud Crawford has always fought like a man who wanted to leave no room for argument. Not simply to win, but to win so cleanly that dissent collapses on contact. So his retirement announcement on Tuesday didn't feel like a sudden fade-out so much as the closing of a file: tidy, decisive, signed in his own hand. Three months after scaling two weight divisions to outclass Canelo Alvarez in Las Vegas and become the undisputed super-middleweight champion,