Koyack, 25, is a former seventh-round pick of the Jaguars back in 2015. He was waived a few months later and signed to the Jaguars practice squad.
Jacksonville brought Koyack back on a futures contract the following season and he managed to make the 53-man roster each of the past two seasons. Koyack returned to the Jaguars on an exclusive rights contract this past April but was waived from injured reserve with a settlement at the start of the season.
In 2017, Koyack appeared in 16 games for the Jaguars and caught five passes for 38 yards receiving and no touchdowns. Pro Football Focus had him rated as the No. 35 tight end out of 71 qualifying players.