I think Romo is too and he choked a lot. Ware and Witten too and they also did nothing while here in the post season.
Jerry and the coaching also plays a part in losing playoff games and win or go home games.
In 2009 playoffs , jerry wanted columbo back at right tackle, after being out with injury for most of the season..
Minn LB's and linemen ate him up and were sacking romo all game due to that one glaring mistake.Free should have played RT.
Coaching and game plan really bad too, and Minn was a good team with farve at qb, and good defense, they almost made the SB,
but the head hunting saints beat them by having a bounty on farve. Also did the same to kurt warner.
So choking isnt always on the qb. Dak has played poorly, but his coaches and game plans have not exactly been great, same for Tony.
A qb can be helped by a good HC, or limited/put in bad situation by a bad HC.
I am tired of dak, but even if they get another qb, with the coaches jerry hires, I think the team will still struggle in playoffs.