Would Johnny Walker fight brother Valter Walker in the UFC? ‘I’m not that crazy’

Half-brothers Johnny Walker and Valter Walker are both top-ranked heavyweights, but the idea of someday fighting each other doesn’t cross their minds. Johnny could move even higher in the heavyweights rankings should he win this Saturday in Las Vegas, where he battles Waldo Cortes-Acosta on short notice in the main event of UFC Vegas 124.…