The Cowboys offense isn't firing on all cylinders. Things are so bad that quarterback Dak Prescott was even sacked by offensive lineman La'el Collins.
Prescott was avoiding the Rams pass rush when he ran into his tackle. Collins briefly wrapped him up to keep him upright and the play was inexplicably blown dead.
The play came late in the second quarter on a third down and the loss of yardage on the "sack" pushed the Cowboys out of field goal range. Give Collins credit for a drive killing sack.