The injury report dominates everything else this week. Nick Bosa (calf), Romello Height (hand), and James Thompson Jr. (ankle) are all ruled out Sunday. That is the entire core of San Francisco's pass-rush rotation, gone. As head coach Kyle Shanahan said of Bosa's recovery: "around a few weeks." On offense, Demarcus Robinson is ruled out with an ankle injury, and Mike Evans is listed as questionable with a hip issue. The San Francisco 49ers may be down to Deebo Samuel Sr. and a thin supporting cast at receiver if Evans cannot go. Both sides of this roster absorbed significant hits, and those injury designations are the dominant factor shaping the spread conversation.

The central question is whether the Arizona Cardinals can actually exploit that open pocket. Arizona is averaging just 16.5 points per game in 2026, converting 34.62% of third downs. They have lost 15 consecutive games against teams with winning records. As Vic Tafur of The Athletic wrote: "This is the 49ers' first game of the season against an NFL-caliber roster that did not fly overnight to play in Australia." Arizona beat the Chargers in Week 1 and can compete. But generating sustained scoring is a different ask, and this Cardinals offense has not answered it this season.

The historical backdrop favors San Francisco. Head coach Kyle Shanahan is 4-2 against Jonathan Gannon in their head-to-head history per the coaching data. Gannon is in his 4th season in Arizona with a 16-37 regular-season record through 2025. Christian McCaffrey has 713 rushing yards and 7 touchdowns across 9 career games against the Cardinals. George Kittle has 852 receiving yards and 9 touchdowns in 15 career games against Arizona. San Francisco's offensive ceiling is fully independent of the three pass rushers who will not play Sunday.

• Brock Purdy's 2026 line (80.4% completion, 125.6 passer rating, 5 TD / 1 INT, zero sacks allowed) makes him the most efficient quarterback on this week's slate. His 12 TD / 2 INT career record against Arizona adds a favorable matchup layer on top of that baseline efficiency.
• The SF pass-rush being decimated (Bosa, Height, and Thompson Jr. all ruled out) matters less than it sounds if Arizona cannot convert opportunities into touchdowns. The Cardinals are averaging 16.5 points per game in 2026 and are 0-15 in their last 15 games against teams with winning records.
• Trey McBride is Arizona's offense. He commands 33% of Arizona's targets in 2026, averages 8.5 receptions and 68.0 receiving yards per game, and has hit 40 or more receiving yards in 4 consecutive games. His last game against San Francisco: 10 receptions, 115 yards, and a touchdown.
• Two ATS trends pull in opposite directions Sunday. San Francisco is 9-0 ATS in their last 9 games as a betting favorite. But Vic Tafur of The Athletic flagged that the 49ers have failed to cover in 8 consecutive home divisional games. One streak ends Sunday.
• Christian McCaffrey's career numbers against Arizona (713 rush yards and 7 touchdowns in 9 games) give San Francisco a ground game that does not depend on the missing pass rushers to protect a lead and control the clock.
• With Evans questionable and Robinson ruled out, George Kittle becomes Purdy's primary red-zone and high-leverage target. Kittle's career average against Arizona is 57 receiving yards per game across 15 games, with 9 touchdowns. He owns this matchup on tape and in the numbers.

The one number that demands honest attention is the ATS home divisional trend. Vic Tafur of The Athletic put it directly: "Did you know that the 49ers have failed to cover the spread in eight consecutive divisional games at home? Take the points." That is a real situational flag. Division games are different. Arizona knows this offense. Brissett's career average of 311 passing yards per game against San Francisco, combined with no meaningful pass rush, means this game will not be a shutout. But covering a spread and keeping the score close are different outcomes. The Cardinals would need to outscore what they have managed in any game this season to threaten the margin. The player props, specifically Kittle over 45.5 and Purdy under 244.5, carry the most conviction here because they lean on the game script rather than the final margin. A comfortable SF lead, controlled through McCaffrey, is where all four SGP legs thrive. The model covers -8, the game script fits the parlay, and the props are the most data-supported plays on the board.

For the full slate, see our NFL picks today and parlay picks.