What happened: Rookie running back Kaelon Black reached the end zone on a 30-yard carry at Mercedes-Benz Stadium on Sunday, recording his first career NFL touchdown. The former Indiana national champion delivered the scoring run with undefeated San Francisco operating short-handed at wide receiver.

Why it matters: Black, selected by the 49ers at No. 90 overall in April after winning a collegiate national title with the Hoosiers, has worked into the offensive rotation since first dressing on game day in Week 2. Explosive ground production from the rookie gives San Francisco another backfield option while key perimeter targets recover from injury.

What to watch: Black will look to parlay his breakthrough scoring run into a larger share of backfield touches as the 49ers continue their regular-season slate.