Mort: Jones is pushing Garrett to give up play-calling duties

Changes have indeed come to Valley Ranch. Apart from the departure of defensive coordinator Rob Ryan and the change in philosophy from 3-4 to 4-3 with the arrival of Monte Kiffin, more seismic shifts are possible. According to Chris Mortensen of ESPN, owner Jerry Jones is pushing coach Jason Garrett to relinquish play-calling duties.  Per…