Shell requested a release from his scholarship to Arizona State, Arizona, Cal and UCLA. Shell also won't be allowed to transfer to Arizona because former Pitt staffers coach there as well.
Shell ran for 641 yards and four touchdowns as a true freshman.
Shell, 6-foot-1, 215 pounds, is a native of Hopewell, Pa., who committed to Graham before he left for Arizona State after only one season. He also will not be allowed to transfer to an ACC school.
Shell was a four-star recruit as rated by ESPN and the No. 26 player overall. He possesses size, speed and power, and was recruited by many schools including Alabama, Florida, Ohio State, Oregon and Tennessee.