NFL Draft: How have Todd Gurley and the other 21 running backs chosen in 2015 fared?

Todd Gurley was the first of 22 running backs to be chosen in the 2015 NFL Draft. How did they all do?

Bills: Karlos Williams (5)

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Karlos Williams played in 11 games for the Bills out of Florida State. He has been suspended multiple times during his NFL career.