He has been the model of consistency since arriving in Dallas via a third-round pick, not missing a single game of his professional career after his rookie season.
The deal maxes out at $29.6 million, according to sources. The Cowboys can restructure Witten's contract and free up close to $4 million in cap space whenever they need it. Witten, who was drafted by the Cowboys in 2003, will be signing his fourth extension with the team. 2017 was the final year on Witten's current contract, but now he will be signed in Dallas through the 2021 season. With this deal, he is showing that he is thinking of playing beyond 2017. Throw in the experience of Witten and the Cowboys aren't far off from competing in another January playoff game.
The 34-year-old Witten is the Cowboys' franchise leader in receptions and is 16 yards short of Michael Irvin's team record for career receiving yards.
Last season, Witten had 673 receiving yards and three scores on 69 catches.
Dallas Cowboys tight end Jason Witten walks off the field during the second half against the Miami Dolphins.
Witten, who turns 35 in May, is one of two tight ends in National Football League history with at least 1,000 catches and 10,000 yards receiving.
In the past few years, Witten's role has changed, with the Cowboys becoming more of a run-first team, but he remains one of the best do-it-all tight ends in the game with his blocking and pass-catching skills.