Football players can move up or down entire rounds based on how they work out in the NFL combine.
Over the last few days, a number of players have tried to leave their mark on NFL coaches so when the 2011 NFL draft rolls around, they will be remembered.
While fans love to argue about whether the combine is an effective tool for measuring talent, many coaches use it to determine the athletic ability of guys who they otherwise might question.
No matter what top picks do in the combine, they won't work their way out of the first round, but a guy who might be a late first-round pick might sneak his way into the top 10.
Keep reading to see which players had the most impressive workouts.