McCalebb is fastest RB this year, Chris Johnson still fastest ever

Auburn’s Onterio McCalebb is the fastest running back at this year’s Scouting Combine, but Chris Johnson is still the record holder for the fastest 40-yard dash in Combine history. McCalebb, who ran a 40 in an unofficial time of 4.21 seconds, wasn’t quite so fast when the official times came out: McCalebb’s official time was…