GameScope NFL research

SF at LAC uncertain forecast

Thu, Dec 17 at 8:15 PM ET · SoFi Stadium

Most likely outcome
SF wins — 58.1%
SF win
58.1%
LAC win
41.9%

Expected score: SF 25.1 – LAC 21.1

Total anchored to the league-wide baseline of 46.2 points — a shared baseline, not a matchup-specific forecast.

Home-field adjustment included (+65 Elo rating points)

Fair odds (display only): SF 1.72 · LAC 2.39

How this forecast is calculated

Team ratings (Elo): SF 1596.3 vs LAC 1474.2. 393 games trained (Oct 30).

Model: nfl-elo-v2 — Elo ratings trained on real ESPN results (2025 regular+postseason and 2026 regular season to date), chronological replay, K=20, home advantage = 65 Elo rating points, applied only at true home venues: games the feed flags neutral-site get no home bonus, in training and in prediction. Totals baseline is the mean total points of the training games (measured, not assumed). Score-model spread/total probabilities use the engine's bivariate-normal assumptions (score std 13.5, correlation 0.3) — documented approximations, not measured NFL parameters. No backtest against closing lines exists; treat all outputs as experimental uncertain forecasts.

What the win probability uses: Elo ratings only, plus a home-field adjustment of 65 Elo rating points at true home venues (no adjustment at feed-flagged neutral sites).

Contextual research (displayed, not in the calculation): Contextual research only — form, rest, injuries, head-to-head, weather, and travel do not change the win probability above.

Totals: Expected scores are centered on a shared league-wide totals baseline of 46.2 points (the mean total of the training games) — a baseline, not a matchup-specific forecast.

Score-distribution assumptions: Spread/total probabilities assume team scores are bivariate normal (score std 13.5, correlation 0.3) — documented approximations, not measured NFL parameters.

Validation status: No backtest against closing lines exists. Treat all outputs as experimental uncertain forecasts.

Data used

Form & rest contextual research

SF (6-1) — 53 days rest

Last 5: 4-1 (1 straight loss)

Oct 25, 2026ATLL20-29
Oct 19, 2026WSHW23-17
Oct 11, 2026SEAW32-29
Oct 4, 2026DENW24-14
Sep 27, 2026ARIW36-30

LAC (0-6) — 60 days rest

Last 5: 0-5 (5 straight losses)

Oct 18, 2026KCL6-22
Oct 11, 2026DENL17-23
Oct 4, 2026SEAL23-30
Sep 27, 2026BUFL16-24
Sep 20, 2026LVL14-26

Head-to-head contextual research LAC 0 - SF 0

Coverage: 2024-2026 regular+postseason schedules (ESPN)

DateScoreWinner
No meetings in coverage period

Injuries contextual research

Week 8 report — availability for Week 15 unknown. These designations were published for Week 8's games. They are the latest available report, kept as dated context; they do not say who will be available in Week 15.

SF

Marques SigleQuestionablequestionable
Garret WallowQuestionablequestionable
Luke GiffordQuestionablequestionable
Upton StoutQuestionableStout (shoulder) was only active as an emergency depth option during Sunday's loss to the Falcons, David Lombardi of SFStandard.com reported Monday.
Nick BosaQuestionableSan Francisco head coach Kyle Shanahan said Monday that Bosa (knee) "has a chance" to return to action Nov. 8 versus the Raiders following a Week 8 bye, David Lombardi of SFStandard.com reports.
Deebo Samuel Sr.QuestionableSamuel (hamstring) has a chance to return following the 49ers' Week 8 bye, Matt Maiocco of NBC Sports Bay Area reports.
Demarcus RobinsonInjured Reserve49ers coach Kyle Shanahan reiterated Monday that Robinson (ankle) has a chance to return following the team's Week 8 bye, David Lombardi of SFStandard.com reports.
De'Zhaun StriblingInjured ReserveStribling (ankle) remains on track to return in December, David Lombardi of SFStandard.com reports.
Mike EvansQuestionableEvans (Achilles) is expected to return after San Francisco's Week 8 bye, David Lombardi of SF Standard reports.
Christian McCaffreyQuestionableMcCaffrey is dealing with a mild hamstring strain rather than a quadriceps injury, and the 49ers believe he'll be ready following the team's Week 8 bye, David Lombardi of SF Standard reports.
Show all 25 (15 more)
Dre GreenlawActiveGreenlaw posted 12 tackles (four solo) in Sunday's loss to the Falcons.
Fred WarnerActiveWarner recorded 13 tackles (six solo) Sunday in a Week 7 loss to Atlanta.
Christian KirkActiveKirk played 20 snaps on offense but didn't show up in the box score otherwise during Sunday's 29-20 loss to Atlanta.
Brandin CooksActiveCooks caught one of three targets for 13 yards during Sunday's 29-20 loss to Atlanta.
Jacob CowingActiveCowing caught three of five passes for 38 yards, added a 10-yard carry and returned one kickoff for 28 yards during Sunday's 29-20 loss to the Falcons.
Jordan JamesActiveJames logged a six-yard carry, turned his lone target into an 11-yard catch and registered 119 yards on four kickoff returns during the 49ers' 29-20 loss to the Falcons on Sunday.
Kurtis RourkeActive
Brock PurdyActivePurdy completed 27 of 40 passes for 288 yards with one touchdown and two interceptions and added two carries for five yards in the 49ers' 29-20 loss to the Falcons on Sunday.
Kyle JuszczykActiveJuszczyk caught all three of his targets for 11 yards and a touchdown during Sunday's 29-20 loss to Atlanta.
Eddy PineiroActivePineiro did not attempt a field goal while going 2-for-3 on PATs in Sunday's 26-20 loss to the Falcons.
Jordan WatkinsActiveWatkins brought in three of six targets for 56 yards in the 49ers' 29-20 loss to the Falcons on Sunday.
Kaelon BlackActiveBlack rushed 12 times for 63 yards and a touchdown and brought in one of three targets for minus-4 yards in the 49ers' 29-20 loss to the Falcons on Sunday. He also lost a fumble and returned one kickoff for 34 yards.
George KittleActiveKittle brought in eight of 10 targets for 88 yards and lost a fumble in the 49ers' 29-20 loss to the Falcons on Sunday.
Siran NealActive
Mykel WilliamsActiveWilliams (knee) does not have any injury designation ahead of Sunday's game against the Falcons.

LAC

Brenen ThompsonQuestionableThompson (quadriceps/hamstring) did not practice Thursday.
Donte JacksonQuestionableJackson (hamstring) was limited in Thursday's practice.
Tre' HarrisQuestionableHarris (hamstring) remained limited in Thursday's practice.
Ladd McConkeyQuestionableMcConkey (concussion) was a full participant in Thursday's practice.
Denzel PerrymanInjured ReserveHead coach Jim Harbaugh said Wednesday that Perryman (undisclosed) is "close" to returning from injured reserve, Alex Insdorf of BoltBeat.com reports.
Deane LeonardQuestionableLeonard (concussion) did not participate in Wednesday's practice, Alex Insdorf of BoltBeat.com reports.
Derwin James Jr.DoubtfulJames (hamstring) suffered a setback in his recovery and will likely miss Sunday's game against the Rams, Eric Smith of the Chargers' official site reports.
Rodney ShelleyQuestionablequestionable
Kayode AwosikaQuestionablequestionable
Show all 25 (16 more)
Bud DupreeActiveDupree (neck) is off the Chargers' injury report ahead of the team's matchup versus the Rams on Sunday.
Joe AltActiveAlt (neck) was not listed on the Chargers' official injury report Wednesday.
KeAndre Lambert-SmithActiveLambert-Smith caught five of nine targets for 32 yards during Sunday's 22-6 loss at Kansas City. He also lost a fumble.
Cameron DickerActiveDicker made both of his field-goal attempts in the Chargers' 22-6 loss to the Chiefs on Sunday.
Charlie KolarActiveKolar caught three of six targets for 20 yards during the Chargers' 22-6 loss to the Chiefs on Sunday.
Kimani VidalActiveVidal turned seven carries into 21 yards and caught three of four passes for 19 yards during the Chargers' 22-6 loss to the Chiefs on Sunday.
Keaton MitchellActiveMitchell turned two carries into four yards, failed to haul in his lone target and returned four kickoffs for 87 yards during Sunday's 22-6 loss to the Chiefs.
Quentin JohnstonActiveJohnston caught one of three targets for 57 yards in Sunday's 22-6 loss to the Chiefs.
Justin HerbertActiveHerbert completed 22 of 37 passes for 204 yards, no touchdowns and one interception in Sunday's 22-6 loss to the Chiefs. He also rushed five times for 26 yards.
Omarion HamptonActiveHampton rushed seven times for 18 yards and caught all four of his targets for 21 yards in Sunday's 22-6 loss to the Chiefs.
Daiyan HenleyActiveHenley (knee) is active for Sunday's game against the Chiefs.
Jamaree CaldwellActive
Dalvin TomlinsonActive
Kendall WilliamsonActive
Elijah MoldenActive
Justin EboigbeActive

Labels: Out = confirmed unavailable; Doubtful = projected unavailable; Questionable = projected uncertain.

Weather & travel contextual research

76.8°F, wind 4.7 mph, precip — mm (next 1h),
Forecast for Sun, Nov 8 at 7:00 PM ET (updated Oct 30). Weather data: MET Norway (api.met.no), CC BY 4.0 / NLOD 2.0

Travel (SF): ~314 miles, no time-zone change

Research only — not betting advice. All probabilities are uncertain forecasts from a simple model, never guarantees or 'locks'. GameScope places no wagers.
Scores/records/injuries: ESPN unofficial API (live). Weather: MET Norway.