Why Dak Prescott is not an 'A' graded quarterback | THE HERD

Dak Prescott is reportedly gripping a football now, but the Dallas Cowboys are prepared to start Cooper Rush against the Philadelphia Eagles in Week 6. This is not the first time Dak suffered an injury that kept him out for weeks, which raises the question on whether the QB is replaceable. Colin Cowherd weighs in, including why the team should not only start Rush but how Dak compares to Kirk Cousins.