In the case of Illinois receiver Arrelious Benn, we've confirmed that the "official" time registered by the school was 4.36. Per a league source, one team had Benn at 4.43 seconds, twice, in the 40-yard dash.
That said, some scouts had Benn at 4.38 seconds, only 0.02 above the official time.
There's also a potential issue at the Pro Day workouts regarding the surface on which the running is done. If the surface is regarded as faster than the FieldTurf at the RCA Dome, teams will add time to the result. In Benn's case, the run occurred at an indoor practice facility, on FieldTurf. Thus, no adjustment will be made.
http://profootballtalk.nbcsports.com/category/rumor-mill/
That said, some scouts had Benn at 4.38 seconds, only 0.02 above the official time.
There's also a potential issue at the Pro Day workouts regarding the surface on which the running is done. If the surface is regarded as faster than the FieldTurf at the RCA Dome, teams will add time to the result. In Benn's case, the run occurred at an indoor practice facility, on FieldTurf. Thus, no adjustment will be made.
http://profootballtalk.nbcsports.com/category/rumor-mill/