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Coach Kyle Shanahan Reveals Reason for 49ers' Loss to Jaguars: “Without Him, There’s No Chance for the 49ers”

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.

Kyle Shanahan Breaks Down 49ers Close Loss to Jaguars | Press Pass

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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49ers Drop Bombshell by Voiding All of Brandon Aiyuk’s 2026 Guaranteed Money – The $120M Star’s Future Takes a Dark Turn as Coach Shanahan Speaks with Heavy Emotion
San Francisco, California – November 22, 2025 The San Francisco 49ers just delivered one of the biggest shocks of the season by officially voiding every dollar of guaranteed money in Brandon Aiyuk’s 2026 contract year. One of the team’s most important offensive weapons now faces an uncertain future, less than 18 months after signing his massive $120 million extension. The move instantly sent shockwaves through 49ers Nation and led many to believe Aiyuk may have already played his final snap in red and gold. According to ESPN and The Athletic, the 49ers determined Aiyuk failed to meet the requirements outlined in the deal signed in August 2024. The nearly $25 million option bonus that was set to become guaranteed on April 1 has now been completely wiped out. It remains unclear whether the team will still pay any remaining base salary or smaller bonuses. This drastic step reflects a fracture that has been growing for months between the player and the organization. Aiyuk has not played since tearing his ACL, MCL, and meniscus against the Kansas City Chiefs in October 2024 – an injury that sidelined him for the entire 2025 season. His rehabilitation has shown little visible progress, and although the team once hoped he could return to practice mid-season, that never happened. With only six regular-season games remaining, the 49ers concluded his chances of returning are essentially zero, and that appears to be the breaking point for the franchise’s patience. When asked about Aiyuk’s situation, head coach Kyle Shanahan spoke with deep emotion: “I know Brandon has been through a lot and nobody wants to see a talented player go through something like this. The thing I want most is for him to find his balance again and his motivation for himself. No matter what happens next, I will always respect Brandon’s effort and wish nothing but the best for him.” Shanahan’s words left many 49ers fans choking back tears with their sincerity. Aiyuk’s future in the red and gold has never looked more fragile. The 49ers will almost certainly look to trade or part ways with him as early as this offseason to clear cap space and restructure the offense. Once an All-Pro and explosive centerpiece of Shanahan’s system, Aiyuk now faces a career-defining crossroads. And the way things are unfolding, the majority of 49ers Nation believes his journey in San Francisco has likely reached its end.