Rowell says he has personally clocked Leak at 4.37 seconds .
Rowell , though , was slightly disappointed in Leak 's 40 - yard dash time , which was conducted on turf and timed digitally .
Rowell says Rowell has personally clocked Leak at 4.37 seconds .
Rowell , though , was slightly disappointed in Leak 's 40 - yard dash time , which was conducted on turf and timed digitally .