San Francisco 49ers On May 7, 2013, McDermott signed with the
San Francisco 49ers as an
undrafted free agent following the
2013 NFL draft. He started in all 16 regular season games and three playoff games, including the 2013 NFC Championship against the
Seattle Seahawks. McDermott was released during final cuts before the 2014–2015 season.
Denver Broncos McDermott was signed to the practice squad of the
Denver Broncos on September 3, 2014. He was released on September 9, 2014.
Baltimore Ravens On October 20, 2014, McDermott signed with the
Baltimore Ravens after incumbent long snapper
Morgan Cox tore his ACL. He played in seven regular season games before being placed on Injured Reserve.
Minnesota Vikings On April 3, 2015, McDermott signed a two-year contract with the
Minnesota Vikings. On August 8, 2016, he signed a four-year extension with the Vikings. In Week 16 of the 2017 season, McDermott suffered a dislocated shoulder and was placed on injured reserve on December 30, 2017. In Week 4 of the 2018 season, McDermott lost the tip of his left pinky finger in an opponent's face mask. He finished the game and played the rest of the year. On August 11, 2019, McDermott was released by the Vikings after the team drafted
Austin Cutting. ==Personal life==