Devastating helmet-to-helmet hits are going uncalled, like the one that left Raiders receiver Darrius Heyward-Bey unconscious and strapped to a stretcher on Sunday.
He joins some distinguished company: Aaron Berry, Justin Blackmon, Rhett Bomar, David Diehl, Nick Fairley, Jerome Felton, Darrius Heyward-Bey, Marshawn Lynch, Brandon Meriweather, Knowshon Moreno, Robert Quinn, Aldon Smith and Eric Wright.