Kyle Fredrickson One of the greatest football players in Oklahoma State history has opened up about longtime concussion symptoms he suffered after 13 years as an NFL running back. Thurman Thomas, who turns 50 in May, was the keynote speaker at an international concussion summit last week in Canada where he explained for the first time how the effects of head injuries continue well after his playing days. “Still to this day, I can’t control my mood swings," Thomas told The Niagra Falls (Candada) Tribune.Read more on NewsOK.com