There was a major discrepancy between the official 40-yard dash time listed for Alabama star wide receiver Amari Cooper at the NFL scouting combine and what he actually ran at Lucas Oil Stadium. Although Cooper is officially listed with a 4.42 clocking, according to NFL sources, scouts clocked him as fast as 4.31, 4.35 and 4.37 seconds on their stopwatches. NFL teams go by their own times in determining draft prospects' speed. There was a video simulcast during the combine that Cooper and West Virginia standout wide receiver Kevin White matching each other stride for stride. Cooper and White are competing to be the top wide receiver drafted overall and are both regarded as high first-round draft picks. When the 40-yard dash times were released, though, Cooper had an official 4.42 and White was listed with a 4.35. Cooper finished last season with 124 receptions for 1,727 yards and 16 touchdowns as a junior before declaring for the NFL draft. Follow me on Twitter: @RavensInsider Aaron Wilson covers the Ravens for The Baltimore Sun