After decades of golf being the only sport where people at home can affect the outcome of a tournament, that finally changed on Dec. 11, 2017. Golf's governing bodies announced that starting Jan. 1, 2018,
TV viewer call-ins regarding possible rules infractions will no longer be considered. Although there had been a growing sentiment to do this for a long time, Lexi Thompson's situation at the 2017 ANA Inspiration was clearly the impetus behind the new rule. Thompson, who was comfortably leading in the final round, was
assessed a four-shot penalty after someone emailed to report she had incorrectly marked her ball on the 17th green during her third round. Thompson eventually lost in a playoff to So Yeon Ryu. Video replay can still be used to review possible rules violations, but there will be designated rules officials to monitor potential issues as they arise at the tournament.