Coach Kyle Shanahan Reveals Reason for 49ers' Loss to Jaguars: “Without Him, There’s No Chance for the 49ers”
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Coach Kyle Shanahan Reveals Reason for 49ers' Loss to Jaguars: “Without Him, There’s No Chance for the 49ers”
San Francisco, September 29, 2025
The San Francisco 49ers suffered their first loss of the 2025 season, falling to the Jacksonville Jaguars with a score of 21-26 in Week 4. While many focused their criticism on the mistakes of the offense and QB Brock Purdy, head coach Kyle Shanahan offered a different, candid perspective: the absence of Nick Bosa was the key reason the team lost control of the game.
The 49ers’ top defensive star suffered a severe injury in the previous game and was forced to sit out for the rest of the season. This was a major blow for San Francisco, as Bosa has been a cornerstone of their defensive system, consistently pressuring opposing quarterbacks. Without him, the 49ers’ defense lacked its usual potency and was easily exploited.
In the post-game press conference, Shanahan spoke with a tone of deep regret:
“Without him, the 49ers faced a lot of difficulties. He’s a critical part of this team and always makes a difference on the field. That said, we have to find ways to adapt, trust in the collective, and let other players step up to fill the void.”
The game against the Jaguars was clear evidence. The 49ers’ defense generated limited pressure, allowing Trevor Lawrence more time to deliver decisive passes. The Jaguars capitalized fully on the gaps in the defensive line, scoring in critical moments and controlling the game’s tempo.
Experts note that while the 49ers still have a disciplined defense, losing Bosa means they lack the star capable of turning the tide with a single play. This forces Shanahan to seek alternatives, from rotating players to adjusting the blitz system, but the void left by Bosa is undeniably significant.
This loss serves as a reminder that the 49ers need not only a steady quarterback but also a healthy defensive cornerstone to go far in the season. And with Shanahan’s admission, San Francisco now faces the daunting challenge of learning to cope without Nick Bosa.
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