Last week during an interview with NBC’s Peter King Dak talked about this, and he talked about where it comes from and how it happened. He credited both Tony Romo and Jason Witten.
While it’s admirable that Dak credited Romo, he didn’t play with him or have the same sort of on-field relationship with him that he did with Jason Witten. Dak connected with Jason Witten over the course of two years, and he was a captain alongside him during Witten’s final season in the NFL last year.
As 2017 was indeed Witten’s last year playing professional football that means that 2018 doesn’t have him in it.