The conversion happened after the disputed Brandon Pettigrew play and before the Cowboys' go-ahead touchdown.
Had holding been called, it would have put the Cowboys in a fourth-and-16 hole on Detroit's side of the field. Dallas likely would have punted and Detroit still would have had the lead.
NFL head of officials Dean Blandino said Monday that the non-call on pass interference against Pettigrew by Cowboys linebackerAnthony Hitchenswas debatable, but holding definitely should have been called on the later play.
Lions quarterbackMatthew Staffordwore a microphone for Sunday's game, and the audio will air Tuesday night on "Inside the NFL" on Showtime.
"Can we explain that or no?" Stafford reportedly said after the officials picked up the penalty flag on the Pettigrew incompletion. "Just flat-out overturning a pass interference call?"
Stafford later could be heard yelling, "Hooome cookin!"
NFL Admits Officials Missed Call
Herm Edwards, Antonio Pierce and Jon Beason react to the news that the NFL admitted officials missed a blatant hold on Ndamukong Suh on a crucial fourth-down conversion from Tony Romo to Jason Witten with six minutes left in Sunday's wild-card game.
Non-Call, No Issue For Cowboys
Todd Archer and Jean-Jacques Taylor make the argument that the controversial non-call against linebacker Anthony Hitchens didn't affect the outcome of Sunday's game against the Lions.