2021 · Week 1

Final

49ers

San Francisco

QB Jimmy Garoppolo

41·33

Lions

Detroit

QB Jared Goff

Ford Field · dome · fieldturf

Closing spread

SF -9.5

Total

46

Model margin

-1.4est.

DET perspective

Push chance

None

half-point line — cannot push

Win probability

  • Lions
  • 49ers

How each play moved the game.

Lions wins49ers wins

Matchup

Where the edges are

Season-long league percentiles for both sides, mirrored. The saturated side of a lopsided row holds the edge.

49ersedge mapLions
  • +0.085EPA / play-0.061
  • 45.5%Success rate42.1%
  • +0.174EPA / dropback-0.022
  • -0.024EPA / rush-0.123
  • 10.9%Explosive rate9.0%
  • +1.73CPOE-0.05
  • 40.6%Third-down rate34.7%
  • 74.8%Red-zone TD rate65.7%
  • 2.30Points / drive1.73
  • 2.0%Turnover rate2.1%

Bar length is league percentile, already oriented so longer is better. The saturated side of a lopsided row holds the edge; rows within ~12 points are washed as even.

The rivalry

SF lead 10–2 since 1999

Meetings average 48.8 points. DET are 7-4-1 ATS in the series.

Previous meetings
SeasonMatchupScoreWinner
2024 · W17DET @ SF4034DET
2023 · playoffsDET @ SF3134SF
2018 · W2DET @ SF2730SF
2015 · W16SF @ DET1732DET
2012 · W2DET @ SF1927SF
2011 · W6SF @ DET2519SF
2009 · W16DET @ SF620SF
2008 · W3DET @ SF1331SF

Box score

Individual performances

49ers

Passing

PlayerC/AttYdsTDINT
Jimmy Garoppolo17/2531410
Trey Lance1/1510

Rushing

PlayerCarYdsAvgTD
Elijah Mitchell191045.51
Raheem Mostert22010.00
JaMycal Hasty133.01
Jimmy Garoppolo320.70
Trey Lance320.70

Receiving

PlayerRecTgtYdsTD
Deebo Samuel Sr.9121891
George Kittle45780
Trent Sherfield23231
JaMycal Hasty11150
Mohamed Sanu1170

Lions

Passing

PlayerC/AttYdsTDINT
Jared Goff38/5733831

Rushing

PlayerCarYdsAvgTD
Jamaal Williams9546.01
D'Andre Swift11393.50
Jared Goff3144.70
Kalif Raymond199.00

Where this game is likely to land

  • Model
  • Smooth (normal)
  • Betting line

Probability of each final margin. Football scoring clusters — the spikes at 3 and 7 are real, and a smooth model misses them.

line -9.52.9%4.6%3.0%7.5%7.2%2.8%

Positive margins favour Lions; negative favour 49ers.

Half-point at risk

1.16%

outcomes that flip if the line moves 0.5

Model home win

45.2%

Expected total

45.5est.

Model

Where the number comes from

Each component is additive, in points of expected margin.

  • Team ratings (opponent-adjusted EPA)-3.15
  • Home-field advantage+1.71
  • Quarterback adjustment0.00
  • Rest differential0.00
  • Expected margin-1.44