By Chris Rosvoglou Former NFL head coach Rex Ryan made headlines this Wednesday due to his latest endorsement deal. Ryan is teaming up with Dr. Scholl’s for this football season. He’ll be a brand ambassador, helping the company with its launch of its new foot spray. “Two things are for certain: I know football, and I know feet,” Ryan said in a statement. “But the stigma around talking about feet has always felt so unnecessary to me. I’m excited to share my expert knowledge with these young Tarheels and help them step up their game – including tackling Athlete’s Foot with the help of Dr. Scholl…