Marcus Mariota unsure he'll throw at NFL CombineHeisman Trophy winner Marcus Mariota is unsure whether he'll throw at the NFL Combine due to a sprained shoulder.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceHeisman Trophy winner Marcus Mariota is unsure whether he'll throw at the NFL Combine due to a sprained shoulder.Published Feb 17, 2015 | Modified Feb 17, 2015SI STAFFShare on FacebookShare on XHome/NFL