FILE - In this Dec. 31, 2017, file photo, a referee tosses a coin as Kansas City Chiefs and Denver Broncos players look on before an NFL football game in Denver. NFL teams have proposed major changes to replay and overtime after a season of consistent criticism of officiating. The Chiefs want to eliminate overtime for the preseason; and get rid of the overtime coin toss so that winner of the coin toss to begin the game may choose whether to kick or receive, or which goal to defend in overtime (AP Photo/Jack Dempsey, File)