49ers vs. Chargers Prediction: Preseason Week 2 Picks and Odds
Justin Herbert and Brock Purdy are both expected to make their 2026 preseason debuts Thursday night at SoFi Stadium. Here's our full prediction and best bet for 49ers vs. Chargers.
San Francisco and Los Angeles meet for the second straight preseason at SoFi Stadium on Thursday night, and this one carries more weight than the typical August exhibition. The 49ers are 0-1 after Kyle Shanahan sat most of his starters in a 19-13 loss to Tennessee, while the Chargers are 1-0 off their preseason opener. Both coaching staffs have signaled that first-teamers will actually see the field this week, setting up a legitimate look at two rosters with real 2026 expectations.
A Preseason Game That Actually Means Something
Justin Herbert is set to make his preseason debut in Jim Harbaugh and new offensive coordinator Mike McDaniel’s system, expected to work for roughly a series before Trey Lance and then DJ Uiagalelei take over. Lance already impressed by playing three quarters in Week 1. On the other side, Brock Purdy is finally getting his 2026 preseason snaps after Shanahan held him out of the opener, working behind left tackle Trent Williams and throwing to Deebo Samuel in what should be a short but telling look.
Where the Trenches and Depth Battles Tilt
Los Angeles counters with one of the more physical defensive fronts in the league. Khalil Mack and Tuli Tuipulotu headline the edge rush, Dalvin Tomlinson and Jamaree Caldwell anchor the interior, and Derwin James Jr. and Elijah Molden lead a safety duo that has been one of the better tandems in football. San Francisco will roll out Fred Warner at linebacker and Deommodore Lenoir in the secondary, though Nick Bosa remains on a gradual return from knee tendonitis, which opens early reps for Keon White and rookie Grayson Halton off the edge.
Special teams could also matter more than usual here. Chargers kicker Cameron Dicker has already flashed in his preseason debut, and return man Derius Davis gives Los Angeles a field-position edge that shows up in a game like this, where backups often decide field position swings once the starters exit. The number has moved throughout the week, with most books now hovering around a pick’em to 49ers -1.5 line and a total sitting in the high 30s, a relatively high number for a preseason game that reflects how much snap time both starting units are expected to log.
| Sun, Sep 20 • 4:25 PM | Spread | Money | Total |
| Miami Dolphins |  +13.5 (-118) |  +650 | O 45.5 (-108) |
| San Francisco 49ers |  -13.5 (-110) |  -900 | U 45.5 (-112) |
Prediction and Best Bet
Both quarterbacks operating behind healthy, established lines should generate enough clean execution in the first half to offset the inevitable sloppiness once the third and fourth stringers take over. Herbert, McConkey, and Johnston getting real run alongside Purdy and Samuel gives this game more juice than the typical Week 2 preseason matchup.
- Prediction: Chargers 23, 49ers 20
- Best Bet: Over the total
With both starting quarterbacks pushing tempo early and backups typically padding the score in garbage time, the over is the more reliable angle in a game where roster battles matter more than final results.