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49ers defeat Dolphins but Shanahan addresses defensive concerns

Yahoo Sports • 1 min read • Latest: Sep 22, 2026, 10:06 PM

Last updated Sep 22, 2026

49ers defeat Dolphins but Shanahan addresses defensive concerns

Summary

The San Francisco 49ers secured a 35-13 victory against the Miami Dolphins on September 20, 2026, yet head coach Kyle Shanahan remains worried about the team's interior run defense following the game. The Dolphins found success on the ground, executing multiple long drives and accumulating 84 rushing yards in the first half., defensive tackle CJ West struggled, receiving low performance grades and being pushed back on key plays. Alongside him, rookie James Thompson suffered a high ankle sprain, potentially sidelining him for weeks. With these injuries, Shanahan may consider rookie Gracen Halton for a more substantial role on the defensive front.

Source Links

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Status Watch

•49ers improve to 2-0 with the win over Dolphins.
•Dolphins attack 49ers' interior defense effectively for 84 rushing yards.
•CJ West's run-defense grade ranks last among defensive interior linemen.
•Rookie James Thompson likely out for at least four weeks with an injury.
•Gracen Halton may take over defensive responsibilities moving forward.

Latest Updates

10:06 PMYahoo Sports — 49ers game review: Kyle Shanahan still stressed about one area after blowout win

What they're saying

"
The San Francisco 49ers' 35-13 romp over Miami did little to ease head coach Kyle Shanahan's anxiety over one defensive weakness. If anything, the issue became more worrisome.
— Yahoo Sports

Related Teams & Leagues

Miami Dolphins San Francisco 49ers NFL Football