Detroit knew from the start they’d need points in bunches if they wanted to survive in Santa Clara — and that’s exactly what they delivered. The Lions logged their fifth game of the year with 40 or more points while also avoiding turnovers, proving once more they’re one of the NFL’s most dangerous attacks. Jameson Williams added another hook-and-lateral highlight, racing to the pylon with encouragement from OC Ben Johnson. Rookie back Jahmyr Gibbs carved up San Francisco’s defense, posting 117 rushing yards and a score on 18 attempts. Jaed Goff stayed sharp too, completing 26 of 34 passes for 303 yards and three touchdowns. Not every drive ended perfectly — twice they settled for field goals and once turned it over on downs inside the red zone — but like an avalanche, their offensive force eventually buried the 49ers. Because the defense remains shaky, Detroit knows its best chance is to keep pouring on points, something they’ve shown they can do at will.

San Francisco’s Thin Roster Proves Costly

The 49ers’ opening half showed off Kyle Shanahan’s offensive brilliance, as he scripted a high-powered start and leaned heavily on rookie Ricky Pearsall alongside George Kittle’s crossing routes. Purdy and company moved the ball with ease early, but Detroit’s adjustments soon exposed San Francisco’s lack of balance. On a critical fourth-quarter snap, Purdy read single-high safety pre-snap and locked onto Pearsall, only for the coverage to rotate into inverted Cover 2. That freed Kerby Joseph to jump the throw and end the comeback bid. Purdy later threw another interception in a six-point game on first down — a spot where a healthy Christian McCaffrey or Jordan Mason likely would’ve shifted the call toward a safer run. Instead, San Francisco leaned pass-heavy even without their top backs, which magnified Purdy’s errors. The decision-making summed up their season: good coaching, but roster limitations and turnovers derailed a winnable contest.

Detroit’s Defense Still Leaking Yards

The Lions’ defensive injuries have been well-documented, and they showed up again Monday. San Francisco opened by scoring touchdowns on its first three drives, jumping to a 21-13 advantage and later leading 28-21. Detroit’s saving grace was its ability to generate takeaways. Joseph collected two interceptions — first on an overthrown Purdy ball, then on the late middle-field jump. Those extra possessions gave Detroit’s offense enough margin to pull through. Coordinator Aaron Glenn deserves credit for putting Joseph in position to disrupt the 49ers’ bread-and-butter passing concepts. Still, against elite opponents, the Lions know they’ll have to play nearly flawless offense to survive. For now, as long as the defense can steal the ball back, they’ll take it.

Kicking Woes Haunt San Francisco

Jake Moody endured a nightmare under the primetime lights. He missed a 51-yard attempt before halftime, then a questionable 58-yarder later, continuing a slump in which he’s now hit only 10 of his last 18 field goals. The meltdown didn’t stop there — Moody also pushed an extra point wide and botched an onside kick out of bounds to end the night. Shanahan has been patient, citing Moody’s earlier ankle injury as a possible reason for his inconsistency, but in a league with slim margins, the leash is short. Unlike a proven veteran such as Justin Tucker, Moody hasn’t earned extended grace. Don’t be surprised if San Francisco explores competition at kicker this offseason, especially with their Super Bowl ambitions hanging in the balance.

Lions Escape California Unscathed

Week 18 now sets up perfectly: Detroit will host Minnesota with both the NFC North crown and the conference’s No. 1 seed on the line. If they win, the Lions claim a crucial first-round bye — something no team needs more considering their injury issues and the toll of a long season. If they lose, they’ll play on the road despite 14 victories. Monday’s victory was doubly sweet because Detroit left without major injuries to key players, a health boost nearly as important as the win itself. Next week’s Sunday Night Football clash with the Vikings is already being billed as one of the season’s defining matchups.

Next Gen Stats Insight (via NFL Pro)

Gibbs gained 117 yards on 18 carries, with 85 of those coming before contact — the second-highest mark of his career.

NFL Research Note

George Kittle topped 1,000 receiving yards on the season Monday, his fourth career 1,000-yard campaign. Only four other tight ends have reached that milestone four or more times: Travis Kelce (seven), Tony Gonzalez (four), Rob Gronkowski (four), and Jason Witten (four).