Some NFL players are grumbling at a new proposed safety rule aimed at further reducing helmet-to-helmet hits.  The change would penalize runners for lowering their heads and initiating contact with tacklers.  Legendary Dallas Cowboys running back Emmitt Smith told KRLD-FM in Dallas this rule change shows the NFL may have lost its mind.  He said it's nearly impossible for a runner not to lower his head if he's about to be tackled.  

Rich McKay, who chairs the league's competition committee, says it would be a personal foul for the runner or tackler to have head-first contact with the crown of the helmet when they run into each other outside the tackle box.  The rule change will be proposed to NFL owners at league meetings next week.