How about Johnny Knox?. 4.25 at the 2009 combine.
If the boys mentioned in this thread dedicated to track I reckon they would go far.
Brings back memories of that Russian guy that was on here who bullshitted he could beat Bolt in a 40 dash.
50m?. 40yds?. 100m will always be the coveted race.
Too much bravado with guys outside track who believe they can hang with the real speedsters.