Yancey Thigpen heads a group of players suing helmet-maker Riddell

A week after Hall of Famer Paul Hornung filed a lawsuit against Riddell, another group of former NFL players including former Steelers wide receiver Yancey Thigpen filed their own suit against the helmet-maker. According to the Associated Press, the lawsuit filed Thursday in Cook County Circuit Cort in Chicago says the players suffered personal and…