Georgia 3rd-stringer Keith Marshall is the fastest RB at 2016 NFL Combine - SBNation.com
NFL Network on Twitter: "Blazin' speed. That's what Keith Marshall (@FootballUGA) just brought. He ran a 4.29u 🔥 #NFLCombine https://t.co/yauTvEpr96" / Twitter
This forgotten RB nearly broke the 40-yard dash record at the Combine - FanBuzz
The Fastest 40 Yard Dash Ever - Gridiron Studs Blog: College Football Recruiting Talk