The NFL is bringing Week 1 all the way to Australia, and the Thursday Night Football opener between the San Francisco 49ers and Los Angeles Rams at Melbourne Cricket Ground has a genuinely fascinating angle buried in the quarterback matchups. Kickoff is set for 8:35 PM ET on Thursday, September 10, streaming exclusively on Netflix, and while most of the attention is on the Rams being favored by a field goal or so, the real story for bettors is what happens through the air.

Both starting quarterbacks arrive with something to prove in different directions. Matthew Stafford is coming off arguably the best statistical season of his career, while Brock Purdy is stepping into a defense that got dramatically scarier this offseason. Here are three QB passing props worth a look for this one, broken down so you understand exactly why the numbers point where they do.

Matthew Stafford Passing Yards: Betting the Under at 265.5

Stafford’s 2025 season was ridiculous by any measure. He threw for 4,707 yards and 46 touchdowns, finishing as the NFL’s leading passer and pacing the league at 268.1 passing yards per game — first overall among every quarterback in football. He completed 65% of his throws on 597 attempts and posted a 109.2 passer rating, numbers that made him a legitimate MVP conversation piece deep into the year.

So why lean under on a QB who was that good just months ago? Context matters here. The Rams didn’t just re-load their offense this offseason — they overhauled their defense, trading for reigning Defensive Player of the Year Myles Garrett and adding All-Pro corner Trent McDuffie via trade, plus free agent Jaylen Watson. Multiple outlets, including PFF, now rank the Rams’ defensive line as the best unit in football entering 2026. A defense that talented changes a team’s game plan. Los Angeles has the personnel to lean on defense and a run-heavy offensive approach behind Kyren Williams rather than needing Stafford to throw 35-40 times a game to win. Sportsbooks have already priced in some regression, dropping his full-season total from 4,707 last year down into the 3,800-3,950 range for 2026 — a sign the market expects a different, more conservative offensive approach out of Sean McVay’s group.

In a Week 1 opener against a division rival with a rebuilt, dominant front seven — and playing at a neutral, unusual international site that tends to produce sloppier, more control-focused football — there’s a real case for Stafford checking in under 265.5, especially if LA builds an early lead and starts feeding Williams and Blake Corum on the ground.

Brock Purdy Passing Yards: Backing the Under Against a Retooled Rams Secondary

Purdy’s line sits at 265.5 passing yards for this one, and the case for the under starts with what the Rams’ pass defense looked like in 2025 before they added Garrett and McDuffie. Even last season — before this offseason’s upgrades — Los Angeles ranked a respectable 19th in the NFL allowing 216.7 passing yards per game, a defense that was already solid against opposing quarterbacks and gave up 6.8 yards per pass attempt while finishing sixth in EPA allowed per pass attempt.

Now bolt Myles Garrett onto that front seven. Garrett has generated pressure on 17.1% of his pass-rush snaps over the last five seasons and is pairing with interior menace Kobie Turner, who racked up seven sacks last year on a 12.4% pressure rate, and edge rusher Byron Young. That trio combined for 227 pressures a season ago — before Garrett even arrived. Multiple analysts, including PFF, now call this the best defensive line in the league. Add McDuffie, arguably the best cornerback traded this offseason, into the secondary, and San Francisco’s offensive line will be dealing with pressure and tight coverage windows all night.

Purdy has been solid but not explosive when defenses can generate a consistent pass rush without extra blitzers — he’s thrown for 240 yards or fewer in several outings when protection breaks down. Against a defensive front this deep, expect San Francisco to lean on quick game and rollouts rather than letting Purdy sit in the pocket, which tends to cap yardage totals even when the completion percentage stays respectable.

Brock Purdy Rushing Yards: Taking the Over at 15.5

This is where Purdy’s mobility becomes the play instead of a limitation. His rushing yards prop sits at 15.5, and history says he clears that number more often than not when he’s dealing with a disruptive pass rush — which is exactly what’s coming Thursday night. Purdy has scrambling instincts that show up specifically in games where protection collapses quickly; some of his higher rushing outputs have come directly against pressure-heavy fronts that force him to escape the pocket rather than sit and read through progressions.

With Garrett, Turner, and Young all bearing down off the edge and up the middle, San Francisco’s game plan almost certainly includes designed rollouts and quarterback-designed runs to slow the rush down and take advantage of Purdy’s legs. He doesn’t need a monster scramble to clear this number — just a couple of well-timed escapes when the pocket folds, which feels close to a guarantee against this specific Rams front.

Putting It All Together for Melbourne

The theme across all three props is the same: the Rams’ defensive overhaul is the story of this game, not just for the final score, but for how it reshapes both offenses’ approach through the air. Expect a night where defensive fronts, not gunslinging quarterbacks, decide the outcome.

If you’re building a same-game parlay for this one, all three unders and overs lean on the same core truth — Los Angeles built a defense that’s going to make both quarterbacks work harder than their gaudy 2025 numbers suggest, and Purdy’s legs are the wildcard that could bail out his own passing prop. For fans getting ready to check the live NFL odds before kickoff, this is a game where the trenches matter more than the box score.