Former Clemson back retires from NFL

[Gavin Oliver]

Broncos RB Zac Brooks has retired.

— Nicki Jhabvala (@NickiJhabvala) April 20, 2017

Brooks signed a futures contract with the team in January. Was added to reserve/retired list today.

— Nicki Jhabvala (@NickiJhabvala) April 20, 2017

[tiger68]

What benefits, if any, will Zack get after 2 years (I think it's 2 years, not sure). I thought you had to play 4 years to get "retirement" benefits, or do his injury issues come into play with the retirement?