49ers turned Rams chances into long touchdown drives

San Francisco’s 27-7 win over the Rams changed shape at the 1-yard line. Los Angeles trailed 17-7 and faced fourth-and-1 there in the third quarter when Osa Odighizuwa stopped Matthew Stafford for no gain. The 49ers took over at their own 1.

Brock Purdy gained nothing on first down. On second-and-10, he found Luke Farrell for 14 yards and a first down at the 15. That catch did not produce the touchdown by itself, but it renewed a possession that had begun with almost no room behind the offense.

The 49ers still had work to do. Purdy scrambled for first downs on gains of 18 and 8 yards before finding Deebo Samuel Sr. for a 15-yard touchdown. The extra point made it 24-7.

The sequence is more instructive than a simple goal-line-stop label. San Francisco denied the Rams at one end, then turned a difficult starting position into a 99-yard touchdown possession at the other. Farrell’s first down was the bridge between the stop and everything that followed.

The earlier lead change followed a similar pattern: a Rams opportunity ended, but the 49ers still had to extend the possession they gained.

Quentin Lake intercepted Purdy with Los Angeles ahead 7-3. Blake Corum then ran four consecutive times for 34 yards, but the Rams’ possession ended when Renardo Green intercepted Stafford at the San Francisco 14.

Kaelon Black’s first two runs on the ensuing possession gained 14 yards. After an incompletion left third-and-8, Purdy found Mike Evans for 13 yards and a first down at the 49ers’ 43. Black added three runs for 18 yards before Purdy threw a 39-yard touchdown to Demarcus Robinson, putting San Francisco ahead 10-7.

Green’s interception gave the 49ers the ball; Evans’s catch kept that opportunity moving on third down. The touchdown required more than either play, but those two moments identify where the possession changed hands and where it was renewed.

San Francisco’s opening possession of the second half began in a much better position. Samuel returned the kickoff 45 yards to the 49ers’ 49, and Christian McCaffrey immediately gained 14 and 16 yards on consecutive runs. Each earned a first down; together they moved the ball to the Rams’ 21.

The possession still needed another first down and a finish. Robinson caught an 11-yard pass to the 6, and Evans later caught a two-yard touchdown pass on third-and-2. The score extended the lead to 17-7.

The return established the starting point, while McCaffrey’s runs quickly renewed the opportunity. Neither fact tells us why those plays worked. They do show how this touchdown possession developed differently from the one that began at San Francisco’s 1.

For the full game, the 49ers converted 7 of 12 third downs; the Rams converted 2 of 9. San Francisco also had 23 first downs to Los Angeles’s 15. Those are related measures, not two independent explanations: third-down conversions contribute to first-down totals.

Evans accounted for three of San Francisco’s seven conversions on one first-quarter possession, with catches of 7, 7 and 8 yards. The drive ended in a 20-yard Eddy Pineiro field goal after an incompletion on third-and-2.

That possession illustrates both the value and the limit of the count. Conversions kept the ball moving, but they did not guarantee a touchdown. The game totals describe San Francisco’s advantage in extending series; they do not, on their own, establish why either team succeeded or failed.