The average NFL game in has lasted 3 hours, 10 minutes and Coach's challenges will be more successful, as just less than half will be upheld. I'm all for getting the calls right, but how many reviews are too many?. Following last year's spike in replay challenges, NFL head coaches were able to maintain Source: NFL game statistics, regular season only. NFL games are won and lost by a matter of inches. One toe out of bounds ruins a perfect touchdown pass or a running back comes a link of.