 On December 2, Firkser scored his first NFL career touchdown on a 12-yard reception from Marcus Mariota in a 26-22 Week 13 victory against the New York Jets.Firkser finished the 2018 season with 19 receptions for 225 yards and a touchdown.Firkser began the season as one of four tight ends on the Titans opening day roster along with veterans Delanie Walker, Jonnu Smith, and MyCole Pruitt.