Question: In the Washington Redskins 83rd season Robert Griffin III suffered a concussion and consequently missed the rest of the preseason, what was his nickname?
Sentence (from "2015 Washington Redskins season"): The Washington Redskins season was the franchise's 83rd season in the National Football League and the second under head coach Jay Gruden and first under general manager Scot McCloughan.
Relevant evidence: Yes