The Lions tried to trick the Cowboys.
#70 had been running to the ref all game and reporting as eligible many times.
For this play, they had 70 run to the ref as usual, but had 68 come over on a delay and further away than 70 and be the guy who actually reported. That’s why Goff held his arm in the huddle and then told 68 when to walk over to report.
The whole purpose of the referee announcing eligible linemen to the defense is because the NFL doesn’t allow “trick” plays even though we call plays trick plays from time to time. Teams used to do things like run 1 guy in from the sideline, but have 2 guys leave the huddle and run to the sideline. One of them wouldn’t cross the line, but stand there like he’s talking, but when the bal was snapped, run down field uncovered for a TD pass. That and similar tricks were banned.
The Lions tricked the ref, unintended, because 70 was closest to the ref even though 68 was likely the guy calling out. The ref is looking at 70 and hearing 68 and screwed it up. Realistically, if the ref had gotten it right, he would have gone to the Dallas huddle and announced that 68, not 70, was eligible. If Dallas had been told the right thing, do you think 68 would have been standing alone in the end zone? No way. The Lions lined up unbalanced. They had only 3 players, 2 left and 1 right who were eligible. 68 wouldn’t have been open for the play. If the Lions hadn’t been trying to trick the Cowboys, there wouldn’t have been a need to talk about going over this play pregame. The refs got the eligible linemen correct all game when the Lions were using an extra lineman or unbalanced line for running.
The Lions tricked everyone, unfortunately.
The Lions don’t get that play if 68 is announced to the defense properly.