∅ Empty Set Football
Week 15 · 2026 regular season

San Francisco 49ers at Los Angeles Chargers

Thu, Dec 17, 5:15 PM PT

Win probability
ESF
(win probability)
SF 72%
28% LAC

No betting line yet. Lines appear once books post them.

Unit matchups · entering week 15

Where each side has the edge

Each offense against the defense it faces, in CAP yards per attempt. Offense: higher is better. Defense (yards allowed): lower is better.

Pass: SF offense vs LAC defense
+1.304th
box score 8.3 · 4th
Edge
SF
−0.0817th
box score 7.4 allowed · 21st
Rush: SF offense vs LAC defense
+0.3111th
box score 4.7 · 6th
Edge
SF
+0.0816th
box score 4.1 allowed · 16th
Pass: LAC offense vs SF defense
−0.0917th
box score 6.6 · 23rd
Edge
SF
−0.2511th
box score 6.3 allowed · 6th
Rush: LAC offense vs SF defense
−0.4727th
box score 4.0 · 21st
Edge
SF
−0.515th
box score 3.5 allowed · 3rd

CAP yards per attempt: yards per play relative to what the down, distance, field position and the specific opponent would predict; offense positive is good, defense (allowed) negative is good. Box score: yards per attempt as an official box score counts them, entering week 15.

CAP yards per attempt · 2026

How each matchup got here

Each unit's CAP yards per attempt entering each week. Offense: higher is better. Defense (yards allowed): lower is better. 0 is what the situation and opponent would predict.

SF pass offense vs LAC pass defense
SF pass offense LAC pass defense (allowed)
−0.5 −0.3 0 +0.3 +0.5 +0.8 +1.0 +1.3 +1.5 +1.8 0 = expected wk 1wk 2wk 3wk 4wk 5wk 6wk 7wk 8 SF +1.30 LAC +0.04 −0.5 −0.3 0 +0.3 +0.5 +0.8 +1.0 +1.3 +1.5 +1.8 0 = expected wk 1wk 3wk 6wk 8 SF +1.30 LAC +0.04
LAC pass offense vs SF pass defense
LAC pass offense SF pass defense (allowed)
−0.8 −0.5 −0.3 0 +0.3 +0.5 0 = expected wk 1wk 2wk 3wk 4wk 5wk 6wk 7wk 8 LAC −0.20 SF −0.25 −0.8 −0.5 −0.3 0 +0.3 +0.5 0 = expected wk 1wk 3wk 6wk 8 LAC −0.20 SF −0.25
SF rush offense vs LAC rush defense
SF rush offense LAC rush defense (allowed)
−0.3 0 +0.3 +0.5 0 = expected wk 1wk 2wk 3wk 4wk 5wk 6wk 7wk 8 SF +0.31 LAC +0.13 −0.3 0 +0.3 +0.5 0 = expected wk 1wk 3wk 6wk 8 SF +0.31 LAC +0.13
LAC rush offense vs SF rush defense
LAC rush offense SF rush defense (allowed)
−0.8 −0.5 −0.3 0 +0.3 0 = expected wk 1wk 2wk 3wk 4wk 5wk 6wk 7wk 8 LAC −0.33 SF −0.51 −0.8 −0.5 −0.3 0 +0.3 0 = expected wk 1wk 3wk 6wk 8 LAC −0.33 SF −0.51
CAP win pct · 2026

How each team got here

CAP win pct entering each week. Higher is better; the league average is 0.50.

0.00 0.25 0.50 avg 0.75 1.00 1.25 1.50 wk 1wk 2wk 3wk 4wk 5wk 6wk 7wk 8 SF 0.99 LAC 0.27 0.00 0.25 0.50 avg 0.75 1.00 1.25 1.50 wk 1wk 3wk 6wk 8 SF 0.99 LAC 0.27
2026 results

Results so far

Each team's games before this one, with ESF's pre-game win probability for the team.

SF San Francisco 49ers

WeekOpponentResultESF win prob
pre-game, this team
1 @ LA Won 46%
2 vs MIA Won 77%
3 vs ARI Won 86%
4 vs DEN Won 60%
5 @ SEA Won 44%
6 vs WAS Won 86%
7 @ ATL Lost 72%

LAC Los Angeles Chargers

WeekOpponentResultESF win prob
pre-game, this team
1 vs ARI Lost 84%
2 vs LV Lost 79%
3 @ BUF Lost 26%
4 @ SEA Lost 26%
5 vs DEN Lost 39%
6 @ KC Lost 30%
8 @ LA Lost 33%
Week 15

Other games this week

Home team's chance to win before kickoff. Higher means the home team is more likely to win.

Dots: ESF model home win probability.

How to read this page

CAP win pct. A fading average of game scores with a half-life of 7 of the team's own games. A win scores 1 plus the opponent's win pct; a loss scores the opponent's win pct minus 1. Last season carries in. League average is 0.50; higher is better.

CAP yards per attempt. Yards per play relative to what the down, distance, field position and the specific opponent would predict. Offense: higher is better. Defense (yards allowed): lower is better.

Box score yards per attempt. Yards divided by attempts, counted the way an official box score counts them: rushing includes scrambles and kneel-downs; passing is gross yards per pass attempt, sacks excluded.

ESF win probability. A logistic regression on both teams' pre-game CAP win pct, with an intercept for home field.