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San Francisco is 4-0 because Kyle Shanahan can still reach for a different answer when the easy offense disappears. Brock Purdy threw two more touchdowns without an interception, Christian McCaffrey punched in a score and George Kittle broke the game open with a 56-yard screen against Denver. Just as important, the defense bottled up Bo Nix for three quarters. The 49ers are winning with both the stars and the structure around them.
San Francisco's rating improved after a 24-14 Week 4 win, led by gains in Recent Performance and Offense Strength.
San Francisco's wide-zone and play-action identity is producing enough offense to carry more of the weekly burden. The 49ers scored 36 against Arizona and moved to 3-0, giving Brock Purdy and the offense room to keep winning even when the defense allows more than the preferred script.
San Francisco has to preserve the clean timing it showed against Miami. Purdy does not need to hunt explosives when the run game, Kittle and the intermediate passing game keep producing favorable downs, but injuries can still narrow those answers quickly.
Pick the winner.
San Francisco owns one of the tougher remaining roads in the league because Los Angeles Rams, Los Angeles Chargers and Kansas City Chiefs form the hardest part of it. PFM has the schedule No. 7 with an opponent average of 81.0 and 4 games against current top-10 teams. The road is not difficult from start to finish, but the stretch around Los Angeles Rams, Los Angeles Chargers and Kansas City Chiefs leaves little room for an off week.
Toughest remaining opponent: 
Kansas City Chiefs at 91.3 PFM.
Shared profile: Roster Strength and QB Stability.
San Francisco supports the quarterback with wide zone and play action, while Los Angeles Rams get there with its offensive structure. That means San Francisco can use run action to create a cleaner passing window, while Los Angeles Rams can keep the down manageable before the quarterback has to create. Offense is the main separator because San Francisco has a stronger answer through wide zone and play action after a defense removes the preferred call.
Seattle and the Rams both enter with deeper recent proof in the NFC West. San Francisco can stay in the race by staying on schedule with the run game, creating easy throws for Purdy and letting the front attack a predictable passer. The remaining problem is age and injury risk across a roster that still depends on several veteran stars.
Badge ended: Loaded Roster.
See the current San Francisco 49ers depth chart across offense, defense and special teams.
Trent Williams remains San Francisco's left tackle, but succession planning cannot wait at this stage of his career. The 49ers need a tackle who can develop into the next blind-side protector for Brock Purdy.
Renardo Green and Deommodore Lenoir start outside, but the live roster lists only seven corners. Another cover player would give San Francisco better injury protection and matchup flexibility.
Connor Colby and Dominick Puni currently start at guard around Jake Brendel. Adding another interior blocker would strengthen depth and help the offense prepare for turnover around its veteran center.
4,265 F-S value
R1 No. 32 · R2 No. 63 · R3 No. 94 · R4 No. 134 · R5 No. 168 · …
San Francisco has won 5 Super Bowls in 8 appearances, most recently Super Bowl XXIX in 1995.
