Every player in the NFL was once a rookie, having to adjust from the collegiate level to the pros.
Some athletes played sparingly while others were expected to contribute immediately.
Adrian Peterson, Randy Moss, Julius Peppers, and Terrell Suggs won the prestigious Rookie of the Year award en route to becoming the superstars they are today.
Who will be next crop of athletes to etch their name in NFL history?
Here are five contenders to become the NFL Offensive or Defensive Rookie of the Year.