For the last four years, Penn State relied heavily on a predictable tandem of Kaytron Allen and Nick Singleton to anchor its offense. As training camp nears its conclusion, new running backs coach Savon Huggins is preparing a drastically different approach. Rather than feature a pair of primary ball carriers, the Nittany Lions plan to unleash a four-man rotation built around Carson Hansen, James Peoples, Quinton Martin Jr. and Cam Wallace. Manag…