Detroit's fourth-down touchdowns changed the game's terms

Detroit converted 4 of 13 third downs. Arizona converted 8 of 18. Useful numbers. A poor verdict on their own for a game the Lions won 45–21.

The more revealing work came one down later. In the second quarter, Detroit converted fourth-and-3 before its tying touchdown, then scored directly on fourth-and-1 and fourth-and-4 to take a 21–7 lead. Arizona reached the doorstep of a stop three times. Detroit kept walking through it.

Sam LaPorta was central to that distinction. His 12-yard catch on fourth-and-3 kept the first scoring sequence alive. An Arizona unnecessary-roughness penalty added 15 yards, and Jahmyr Gibbs followed with runs of 16, three and one yard to tie the score.

The next fourth-down answer was more punishing. LaPorta caught an 11-yard pass on third-and-12, leaving fourth-and-1. Jared Goff then found him for a 38-yard touchdown. Later, a third-down incompletion left fourth-and-4 at the Arizona 8. Goff's next pass went to Jameson Williams for a touchdown.

That is the distinction the third-down totals flatten. Those failures did not become completed defensive stops. Fourth down preserved the tying opportunity and supplied the next two touchdowns outright. No grand statement about Detroit's philosophy is necessary. In this quarter, forcing another down was not enough to get the Lions off the field.

Arizona opened its first possession of the second half with a 38-yard completion, reaching the Detroit 28 while trailing 24–7. That was an opening worth taking seriously. It did not survive the next two snaps intact.

D.J. Reed stopped Jeremiyah Love for a two-yard loss. Alim McNeill and Skyler Gill-Howard then shared a nine-yard sack of Jacoby Brissett. First-and-10 at the Detroit 28 had become third-and-21 at the Detroit 39.

That is disruption with a visible consequence. The completion had moved Arizona into position to threaten the lead; the losses changed the distance it had to solve. A four-yard completion on third down left fourth-and-17, and Chad Ryland missed a 53-yard field goal. Detroit still led 24–7.

The losses explain the difficult down and distance, not why the kick missed. Keep those separate. My read is that this little stretch deserves more weight than the explosive completion that began it. Arizona gained ground in one large bite, then spent the rest of the possession trying to recover from two damaging snaps. The opening was real. So was the resistance that followed.

At 38–14 in the fourth quarter, Arizona faced third-and-1 at the Detroit 19. An incompletion brought fourth-and-1. This time, the extra down ended the possession: Aidan Hutchinson and Malcolm Rodriguez shared a one-yard sack of Brissett.

Detroit followed the stop with a touchdown possession. But calling it a march would sand off the important parts. The Lions had obstacles to clear, and Amon-Ra St. Brown supplied two of the answers that kept the possession moving.

An early penalty pushed Detroit to first-and-15; Gibbs answered with a 15-yard run. Later, an incompletion left third-and-6 at the Arizona 25. St. Brown caught Goff's next pass for seven yards. Farther downfield, consecutive Gibbs runs gained two yards and then none, leaving third-and-8. St. Brown caught a 13-yard pass to the Arizona 3. Gibbs eventually finished with a three-yard touchdown run for a 45–14 lead.

The sack ended Arizona's opportunity. St. Brown's catches prevented Detroit's ensuing possession from ending at either of those third downs. That makes them more than supporting detail beneath Gibbs's touchdown. They were the extensions that allowed the finish. Arizona's fourth-and-1 produced a change of possession; Detroit's two later third-down tests produced another set of chances and, ultimately, seven more points.