Can Donovan Edwards, Kalel Mullings be next thunder and lightning duo in Michigan backfield?

Michigan Wolverines football received big news when Donovan Edwards announced his return for his senior season. Kalel Mullings, who just wrapped up his fourth year in the Maize and Blue, also has a year of eligibility left and did not declare for the NFL Draft. Those two headline what is a deep and talented running back room even after losing Blake Corum to the pros.