debut, recording five receptions for 47 yards in a 24–21 loss to the Chicago Bears. On September 16, Eifert caught three passes for 66 yards against the Pittsburgh Steelers. On October 20, Eifert caught his first career touchdown on a 32-yard pass from Andy Dalton against the Detroit Lions. On December 15, 2013, Eifert caught his second touchdown of his career against the Pittsburgh Steelers. On December 22, Eifert left the game against the Minnesota Vikings early with a stinger injury. This injury sidelined Eifert for the season finale against the Baltimore Ravens. He finished his rookie season with 39 receptions for 445 receiving yards and two receiving touchdowns. 2014 season On September 7, 2014, during the first game of the 2014 season against the Baltimore Ravens, Eifert recorded three receptions for 37 yards before suffering a dislocated elbow and shoulder labrum tear after landing awkwardly on his arm while trying to twist out of a leg tackle. He was placed on injured reserve on September 10, 2014, and ended up being out for the season. 2015 season On September 13, 2015, Eifert posted a career day with nine receptions for 104 yards and two touchdowns in the season-opening victory over the Oakland Raiders. On October 11, Eifert was Andy Dalton's biggest target in a Week 5, 27–24 comeback victory against the two-time defending NFC Champion Seattle Seahawks with eight receptions for 90 yards and two touchdowns. On November 5, Eifert finished with five catches for 53 yards and three touchdowns in a 31–10 Bengals win over the Cleveland Browns, tying him with Rodney Holman (1989) and Bob Trumpy (1969) for the Bengals franchise record for single-season touchdowns by a tight end, with nine. On November 22, Eifert caught three passes for 22 yards and two touchdowns against the Arizona Cardinals. Eifert became the franchise leader for most single-season touchdowns by a tight end. On November 29, 2015, Eifert caught a touchdown in the Bengals' 31–7 win over the St. Louis Rams. Eifert left the game in the third quarter with a stinger injury. The injury sidelined Eifert for two games until the season finale. On January 3, 2016, Eifert capped off the regular season with a touchdown in the Bengals' 24–16 win over the Baltimore Ravens. He finished the 2015 season with 52 receptions for 615 receiving yards and 13 receiving touchdowns. Eifert earned a bid to the 2016