The last touchdown changed the value of Arizona's answer
A field goal could have erased San Francisco's 29–27 lead. After the touchdown and extra point at 1:31, it could only trim the deficit. That distinction deserves the weight in the 49ers' 36–30 win over Arizona.
Brock Purdy's 20-yard touchdown pass to George Kittle, followed by the successful extra point, made it 36–27. San Francisco had rebuilt a nine-point cushion with little time remaining. The Cardinals could score next without taking the lead—or even drawing level.
That is exactly what happened. Chad Ryland's 49-yard field goal with 34 seconds left made it 36–30. Three points went on the board. San Francisco remained ahead by six.
The touchdown did not finish the game by itself. Deebo Samuel Sr. still had to field the ensuing onside kick, and Purdy's kneel followed. But the offense had changed the closing problem. Instead of defending a lead that three points could overturn, San Francisco could absorb those points and remain in front.
Score margin through the game
The field goal was a score, not a solution. Kittle's touchdown had made sure of that.
The penalty's real damage was a fresh set of downs
The earlier fourth-quarter cushion came with an important assist from Arizona. At 9:14, San Francisco led 23–20 and faced third-and-6. Purdy's pass fell incomplete, but roughing the passer erased the play and gave the 49ers first-and-goal at the Arizona 5.
The six penalty yards were not the full damage. The new down was. An incompletion on third down became another scoring opportunity near the goal line.
San Francisco then complicated its own opportunity. An illegal-formation penalty pushed the ball back five yards, leaving first-and-goal from the 10. Purdy found Kittle for the touchdown at 8:42. Eddy Pineiro's extra point hit the right upright, so the lead became 29–20 rather than 30–20. It was still a two-score gap.
The roughing call did not guarantee that finish. San Francisco had to convert the new chance, and Kittle supplied the catch. But the penalty changed the immediate problem from third-and-6 to first-and-goal before the touchdown restored a nine-point lead.
That is a costly exchange: Arizona wiped away an incompletion, and San Francisco turned the reprieve into breathing room.
Arizona absorbed the sack without surrendering the possession
Arizona's response to that 29–20 deficit shows why disruption and a stop cannot be treated as the same thing.
Keion White sacked Jacoby Brissett for an eight-yard loss at 8:38, leaving second-and-18. That was a real constraint, not cosmetic pressure. Arizona needed to recover lost ground before it could recover the score.
Brissett completed seven yards to Trey McBride. Third-and-11 remained. Then Marvin Harrison Jr. caught a 19-yard pass for a first down, clearing the immediate obstacle White had created.
Arizona kept extending the possession. Brissett gained two yards on third-and-1. Later, McBride caught a four-yard pass on third-and-2. At 2:51, Brissett's one-yard touchdown run and Ryland's extra point brought the Cardinals within 29–27.
The clock marks the work involved: White's sack came at 8:38; the touchdown came at 2:51. Arizona overcame the long-yardage problem, converted again and reached the end zone. It still trailed.
White's sack mattered because it made the task harder. Harrison's conversion mattered because Arizona refused to let that difficulty end the possession. Neither fact supports a tidy story of defensive control. The Cardinals repaired the damage and made it a two-point game—an answer substantial enough to threaten San Francisco, but not enough to put Arizona ahead.
Moving the chains was not enough to catch San Francisco
Arizona showed it could survive a sack and convert its way back into the contest. San Francisco's answer was to keep rebuilding the margin that work had reduced.
One nine-point cushion followed a penalty-created first down. The next followed Arizona's long repair job. Kittle finished both opportunities, and the later touchdown left a field goal unable to overturn the lead.
That is the distinction worth keeping from this finish. San Francisco did not need every disruption to become a stop. Its offense kept increasing the size of the answer Arizona needed—and the Cardinals ran out of game before they supplied it.
