Walker was a real gem in Tennessee.

After joining the Titans in 2013, Walker's first five seasons in Tennessee resulted in arguably the best five-year stretch in franchise history by a player at his position. From 2013-2018, Walker's 356 receptions and 4,156 receiving yards (to go with 26 touchdowns) set a franchise high for a tight end in any consecutive five-year period. His reception total during that time span led all NFL tight ends and his yardage total ranked third among all NFL tight ends.

In 2015, he set the single-season franchise records among tight ends with 94 receptions and 1,088 receiving yards, leading to his first career Pro Bowl invitation.

Walker, who struggled health-wise during the 2019 season with the ankle he had surgery on in 2018, ended up playing in seven games in 2019. He finished the season with 21 catches for 215 yards and two touchdowns and was inactive for four games leading up to him being placed on Injured Reserve.

In his 14-year playing career, Walker has 504 catches for 5,888 yards and 36 touchdowns. He played in three Pro Bowls in his seven seasons with the Titans.

In December, Walker told Titans Online he wants to return and play football in 2020 when he's healthy.

"My time in Nashville has far exceeded any expectations I had when signing with the Titans," Walker said in a statement posted on social media on Friday afternoon. "I knew I was coming into an organization with a goal of helping to rebuild a culture, bring leadership to a locker room and set a standard of winning for the Tennessee Titans. In my seven seasons here I am proud of the work we've done to achieve those goals. For every hard-fought catch or last-minute comeback win, I'll also remember each and every person that made my time here special.