Sports and Leisure
A National Football League coach is permitted to initiate two challenges to referee calls per game (outside of the final 2 minutes in each half). If both challenges are successful, then the coach is given a third. During a challenge, the referee reviews the play in question on a replay monitor on the field, and the call is either confirmed or the challenge is upheld. The NFL reports the time required to resolve a coach's challenge is less than 5 minutes. A sports statistician would like to check this claim. Describe a method for obtaining a simple random sample of challenges during NFL games.