He was signed by the Packers as an undrafted free agent on May 30, 2012. Bostick spent his entire rookie season in 2012 on the practice squad. Playing primarily on special teams, Bostick made his NFL debut on September 15, 2013 against Washington. He recorded his first NFL touchdown catch on November 10, 2013 against the Philadelphia Eagles, on a 22-yard pass from Scott Tolzien, in a play that was also Tolzien's first career touchdown pass. Bostick finished the 2013 season with 7 receptions for 120 yards and a touchdown in 11 games. He missed the Thanksgiving Classic due to a concussion suffered during the November 24 game. On December 15 against Dallas, Bostick suffered a foot injury late in the second half; he was placed on season-ending injured reserve six days later. Bostick played 13 games in the 2014 season and made 2 receptions for 3 yards and a touchdown. On November 9, in a Sunday night 55-14 win over the Chicago Bears, Bostick made the Packers' first touchdown score, on a pass from Aaron Rodgers on fourth down from the Bears' 1-yard line. In the against the Seattle Seahawks on January 18, 2015, with slightly over 2 minutes remaining and the Packers leading 19–14, Bostick, the Packers' third-string tight end, misplayed a Seahawks onside kick. The ball bounced off his helmet and was recovered by Seahawks wide receiver Chris Matthews. In the ensuing drive, the Seahawks scored a touchdown and two-point conversion to go ahead 22–19. Mason Crosby made a game-tying field goal with 14 seconds left, but Seattle won 28–22 in overtime. In his postgame interview, Bostick acknowledged that he was supposed to block so that Jordy Nelson could recover the onside kick. Bostick was released on February 16, 2015.
Minnesota Vikings
Bostick was claimed off waivers by the Minnesota Vikings on February 18, 2015. Bostick was released by the Vikings as part of the first wave of roster cuts on August 30, 2015.
Arizona Cardinals
On September 7, 2015, the Arizona Cardinals signed Bostick to their practice squad. On September 22, 2015, he was released by the Cardinals. On October 2, 2015, Bostick was re-signed to the Cardinals' practice squad. On December 1, 2015, he was released from practice squad.
On December 8, 2015, the New York Jets signed Bostick to their practice squad. He finished his career in 2017 with the New York Jets. He played in 16 games, starting in 7 of them, finishing the season with 8 catches for 63 yards.
