SANTA CLARA, Calif. (AP) — The way Matthew Stafford and the Los Angeles Rams picked apart the injury-riddled defense for San Francisco , it raised questions about why the 49ers weren't more aggressive before last week's trade deadline .

But the problems might have been big enough that even adding another pass rusher might not be enough for a unit that has already lost Fred Warner, Nick Bosa and Mykel Williams to season-ending injuries.

The Niners allowed six touchdowns on Los Angeles' first eight drives of the game and fell further behind in the NFC West race with a 42-26 loss to the Rams on Sunday.

“We all know that it’s a challenge with how many guys that are missing on D, so we truly understand that,” coach Kyle Shanahan said. "I know we can do better than what we did today tho

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