He also recorded an unofficial time of 4.75 seconds .
At the 2018 NFL combine , Harrison garnered attention after running the 40 - yard dash in 4.9 seconds , the fastest of any offensive line prospect .
Harrison also recorded an unofficial time of 4.75 seconds .
At the 2018 NFL combine , Harrison garnered attention after running the 40 - yard dash in 4.9 seconds , the fastest of any offensive line prospect .