Dak Prescott failed to live up to his efforts against the Tampa Bay Buccaneers as the Dallas Cowboys were pushed out of the postseason. So … Colin Cowherd is calling for a trade. The Dallas Cowboys saw their season end again at the hands of the San Francisco 49ers on Sunday at Levi’s Stadium. The 19-12 loss is a bitter pill to swallow, considering defensive coordinator Dan Quinn’s unit did enough to win the game. But … Dak and the offense were found wanting again in the biggest spots. Fox Sports’ Colin Cowherd stated on his talk show “The Herd”…