Kyle Shanahan explains why Cowboys' Dak Prescott has 'always been a challenge' ahead of divisional round game | CBS Sports Headlines Kyle Shanahan explains why Cowboys' Dak Prescott has 'always been a challenge' ahead of divisional round game Shanahan seems to be a big fan of the Dallas quarterback ESN … Continue reading Kyle Shanahan explains why Cowboys' Dak Prescott has 'always been a challenge' ahead of divisional round game