Linehan was brought here via Garrett. Garrett interfered with Callahan as OC, the latter was changing the offense. Jerry after the season, removed Garrett from the OC position, but compromised as as not to change the offense, which is why they brought in Linehan as the play-caller.
This made Callahan pretty upset and even Jerry said it wasn’t fair to him and JG was effectively the play-caller, t they weren’t going to let Callahan leave to interview for OC positions, which he had some interest, and he had to play out the final year of his contract. Callahan bounced as soon as the season was over and Cowboys couldn’t do anything about it irrespective.
Jason worked under Linehan in Miami. Another guy that Jason brought in that failed was Dooley, the WR coach and he was one of the scapegoats last year.
So now Linehan is the new scapegoat, but it’s clear this was a Jerry move.
As I said, Jerry will always shuffle coordinators now, while protecting Garrett. I’m pretty sure Jerry and Co. have connections in the media to set the grounds for blaming other than Garrett.