The uncertainty around Nick Bosa is exactly the kind of headache the 49ers did not need heading into Week 3.
Bosa has now missed back-to-back practices before San Francisco’s home game against the Arizona Cardinals, and the injury report lists him with knee and calf issues. That alone raised eyebrows, especially after he played the first two games of the season without any obvious trouble. With last year’s ACL tear still in the background - his second since entering the league in 2019 - the questions around his durability came fast.
What made the situation messier was the back-and-forth over just how serious this is. NBC Sports Bay Area’s Jennifer Lee Chan said there was concern Bosa might be dealing with something that could sideline him for multiple weeks, possibly longer. That quickly got picked up by 95.7 The Game, but Chan pushed back on the way her comments were being framed and stressed that she had said Bosa “could” be dealing with a serious injury, while also noting she “could be wrong:”
I said “COULD HAVE” have due to his practice status changing and other factors.
I also said I COULD be wrong.
Let’s not pick and choose words. https://t.co/sd5QWJ3BHJ
- Jennifer Lee Chan -all platforms: @jenniferleechan (@jenniferleechan) September 25, 2026
The noise around the injury was the last thing 49ers fans wanted to sort through, but Adam Schefter later provided a clearer answer.
Schefter reported that Bosa pulled his calf during Thursday’s practice and is expected to miss “a few weeks,” including Sunday’s matchup with the Cardinals. He also said the team is still deciding whether Bosa needs to be placed on injured reserve:
Five-time Pro-Bowl DE Nick Bosa pulled his calf during Thursday’s practice and now is expected to miss “a few weeks”, including Sunday’s game vs. the Cardinals, sources tell me and @RapSheet. The team is figuring out whether or not Bosa needs to be placed on injured reserve. pic.twitter.com/eQIb7JBKut
- Adam Schefter (@AdamSchefter) September 25, 2026
However it shakes out, the news is rough for San Francisco. Bosa is still the 49ers’ top pass-rusher by a mile, and the team has not done much in recent years to find a true No. 2 who can take some of that load off his shoulders.
In Other News...
49ers Suddenly Face A Nick Bosa Problem At The Worst Time
Nick Bosas name landing on the injury report with a calf issue is the sort of development that can change the mood around a team in a hurry. For a 49ers defense built around his ability to wreck games off the edge, any concern involving Bosa immediately carries extra weight, and the timing only adds to the unease.
The early buzz from NBC Sports Bay Areas Jennifer Lee Chan and other insiders has only sharpened the concern, with the possibility that the injury could cost him more than a week. There is still no official confirmation on the full extent of the issue, though, and Kyle Shanahan is expected to speak soon, which should bring the first real clarity on just how serious this problem might be. [Read more 🡒]
49ers Suddenly Have A Bigger Nick Bosa Problem Than Arizona
Nick Bosas latest setback leaves the 49ers facing more than just a one-game absence against Arizona. The star pass rusher was officially ruled out because of a calf injury he suffered in practice, and the outlook is now stretching beyond this weekend. San Francisco is still weighing whether to put him on injured reserve, a decision that would signal a longer detour for one of the leagues most important defenders.
The bigger concern is the broader health picture around Bosa, whose knee has been watched since training camp. What started as routine maintenance has now turned into another week-to-week question for a team that counts on him to shape games at the line of scrimmage. For a 49ers defense built around pressure up front, the timing makes the absence feel larger than the Cardinals matchup itself. [Read more 🡒]
49ers Week 3 Injury Picture Centers On Two Crucial Veterans
The 49ers Week 3 injury picture is starting to come into focus, and it carries a familiar kind of weight for a team trying to keep its defense in rhythm. San Francisco and Arizona both put out their injury reports ahead of the matchup, with some players working back into practice while others stayed on the sideline, leaving the final availability list unsettled with one more practice still to come.
What stands out most is how much attention the 49ers linebacker group continues to draw from the other side. Cardinals quarterback Jacoby Brissett and head coach Mike LaFleur both singled out the duo for the way they play, a sign that San Franciscos front seven still commands respect even as the injury report adds a layer of uncertainty heading into the weekend. [Read more 🡒]