Nick Bosa Injury: A Pulled Calf in Practice, and I'm Out of Patience
Two games back from his second torn ACL, the best player on our defense pulled a calf on a Thursday in Santa Clara. He's out a few weeks, and I can't stop thinking about 2027.

I found out in the Costco parking lot on El Camino. Trunk open, a flat of water half in and half out, and the group chat going off so hard my phone slid off the roof of the car. First text was just his name. Second text was one word, calf. Third text was my brother in law, who's a Raiders guy, sending a laughing emoji, and I stood there holding a case of Kirkland water deciding whether I was allowed to throw it at a Tesla.
Nick Bosa pulled his calf in practice on Thursday. In practice. Not on a sack, not fighting through a double team on third and eight with the game on the line. At practice, in Santa Clara, on a Thursday in September. He's going to miss a few weeks, and the first of them is Sunday against Arizona.
Arizona. Week 3. You already know why I put the water down.
Week 3, the Cardinals, again
Last September, week 3, Cardinals, Bosa went down and walked off, and it was the right ACL. Season over. That was his second torn ACL in the NFL. The first one was the left knee in week 2 of 2020 at MetLife against the Jets, on that turf everybody hates. So now the last two seasons have been blown up by a week 3 game against the same team, and this time he didn't even make it to the game. I'm not superstitious. I've also worn the same unwashed Bosa shirt on every game day since the Melbourne kickoff, so maybe I am.
What gets me is that I'd finally let myself relax. He played the opener in Australia. He played Miami. He was on the field for about 63 percent of the defensive snaps across those two games, which is exactly what you'd want from a guy coming off a knee rebuild, and against the Dolphins he was the best defender on the field, five pressures, living in the backfield even without a sack. I told my dad on the phone after that game that Bosa looked like Bosa again. My dad, who's been watching this franchise since the Candlestick days, said "for now." I hate that he was right. I hate it.
And the detail that makes me want to lie down on the asphalt: he showed up on Thursday's injury report with the knee listed right next to the calf. Wednesday was a scheduled rest day. That was the plan working. Thursday was the plan falling apart.
The list, because apparently we're keeping one
I'm not going to pretend I didn't sit in the car and count. Core muscle surgery at Ohio State that ended his college career early. The ankle in his rookie camp. The left ACL in 2020. The hip and oblique stuff in 2024 that had him in and out. The right ACL in 2025. Now the calf, two games into the comeback. He turns 29 next month.
When he's out there, he's the most important defensive player we've had since the Justin Smith and Aldon days, maybe longer. Defensive Player of the Year in 2022. Five Pro Bowls. I'm not arguing about whether he's great, and nobody who watches him play is either. I'm arguing about how many Sundays we actually get the great version, and the honest answer is fewer every year, and the injuries keep getting dumber. An ACL on a play, I can live with. A calf in practice feels like the body filing a complaint.
I know what I'm about to say isn't fair to him. I'm saying it anyway. This is ridiculous. It's ridiculous that the one guy on the defensive line we built the whole thing around can't get to October in one piece.
Why this one actually scares me about his future here
Follow the money for a second, because the front office will. Bosa signed the $170 million extension in September 2023, and it runs through 2028. His 2027 cap charge is $54.87 million. Fifty four point eight seven. That's the number that's going to sit on a whiteboard in that building next spring, next to a guy turning 30 with two reconstructed knees and a calf that went in a practice. The 2027 offseason was always going to be the moment they either extended him again or started thinking about the exit. I'd assumed the extension. As of Friday I'm not assuming anything.
This front office has never been sentimental when the math turns. We've watched them move on from guys we loved, and they'll love Bosa right up until the number on the whiteboard and the number of games he's spent in the training room stop lining up. If this is a two week thing and he comes back and wrecks people through January, none of this matters and I'll happily pretend I never wrote it. If it turns into another stretch of maybe next week, the conversation in March changes, and I don't think any of us are ready for that one.
Is that overreacting to a calf? Probably. Tell me the last time overreacting to this team's injury news turned out to be wrong.
Who's even left up front
This is the part that turns annoyed into sick. Alfred Collins tore his patellar tendon and he's done for the year. Mykel Williams is still on PUP with his knee. Sam Okuayinonu and CJ West are on injured reserve. James Thompson Jr. has a bad ankle. Romello Height, the rookie, had surgery on a broken hand and nobody knows if he's playing Sunday. And they're leaning against putting Bosa on IR partly because they're running out of room on it. Read that again. The injured reserve list is too crowded to put Nick Bosa on it. That's where we are in week 3. I wrote about the whole defensive line mess separately, because it deserves its own column.
So Sunday at 1:05 at Levi's, the pass rush is whoever can still walk, plus Ogbo Okoronkwo from the August signing spree. Fred Warner is going to have to cover half the field and blitz the other half. Raheem is going to have to scheme pressure out of nothing, and honestly that's what he's here for. We're 2 and 0. The plus 42 is real. It was also built with Bosa on the field.

What I actually want
I want them to be boring about it. Don't rush him for Arizona, don't rush him for New England, don't throw him out there at 80 percent because the pass rush looks thin on tape. A calf that gets rushed turns into a calf that goes again, and a calf that goes again in October turns into a guy compensating on a rebuilt knee, and I've seen that movie. We don't need Bosa in September. We need him in January, and we need him to still be the guy next September, when the $54.87 million conversation starts.
I also want him to know nobody here is mad at him. I'm mad at this. The calf, the knees, the training room, the week 3 Cardinals curse I'm now fully going to believe in until somebody proves me wrong. He's been the best thing about this defense since 2019 and by every account he did everything right to get back. It just keeps happening.
I got the water in the trunk eventually. Drove home the long way so I'd have more time to be annoyed before I walked in the door. Put the Bosa shirt in the wash. First time since Melbourne. If that's what did it, I'm sorry, everybody. If it isn't, I'd love for somebody in that building to tell me what is.
The rest of this week is on the schedule hub and the depth chart, and the last time I got to feel good about Bosa is in the Melbourne recap. Go read that one. I need to.
And it isn't one week. Shanahan said Monday the calf keeps him out against Denver too, which is a big part of why the Broncos game feels like the real test of this start.
Where Bosa and everyone else stands this week is on the 49ers injury report, which we keep current through the season.
More coverage: 49ers · NFL · Bay Area Sports Blog home