The problem with that is recent statements from team owner and GM Jerry Jones who said “[We] want Murray for his career”.
Murray reportedly was not interested in the Cowboys initial offer that would have seen him make over $4 million dollars a season. Peterson is currently making $12.75 million, and Dez Bryant would make over to $12 million this season if the team opted to use a franchise tag on him.
There is probably no financial way the Cowboys could afford Peterson at his current rate, and keep Bryant, and given the fact that all three have expressed interest in being Cowboys, Jones may be inclined to hold out in the hopes of a bargain price for one of all of them.
Regardless of how this all plays out the Cowboys are going to have one of these guys on the roster next season, and that might be enough.