The 49ers’ 5-0 start isn’t the headline. That was always in the range of expectations for a team built to contend. The real surprise has come on the back end of the defense, where San Francisco’s safety group has gone from a preseason question mark to one of the early bright spots of the season.
That spot looked thin entering 2026, and the 49ers didn’t do much to change it. They made zero significant additions at safety, choosing instead to stick with the same trio from last year: Ji’Ayir Brown, Malik Mustapha, and Marques Sigle.
On paper, that setup raised concerns. Brown never fully matched the promise of his rookie season and was viewed as a shaky starter.
Mustapha was still trying to regain form after returning from a torn ACL, and his coverage had been a problem while some of his best traits in the box seemed muted last year. Sigle had the clearest path to rise, but there were obvious limits to his game - solid against the run, aggressive, and mostly dependable in coverage, yet prone to panic when targeted and without much ball production.
Five games in, that script has been flipped.
Brown has steadied himself enough that he hasn’t been the source of constant breakdowns, which matters on a defense like this. He’s not spotless, but the mistakes aren’t piling up the way they once did.
Mustapha, meanwhile, has looked like a player who’s taken another step after last season and is starting to resemble the hard-hitting presence he showed as a rookie. His first start of the year came against the Seahawks, and he made it count.
“I thought he played unbelievable,” said Kyle Shanahan. “He’s been waiting for that moment and he was ready for it. He did a hell of a job.”
Sigle’s rise was real too before a high ankle sprain slowed him down. Shanahan praised what he had been bringing in both phases of the game.
“I think he's been playing his ass off in the run and pass game,” Shanahan said. “The way he's filled on some of these tackles, just how solid he's hit people and how quickly he's done it getting up in there. I thought he's done it good in the pass game too.”
All three safeties deserve credit for the way they’ve played, but the coordinator deserves a share of it too. Raheem Morris has found a way to get more out of this group than anyone had reason to expect before the season. What was supposed to be the 49ers’ weakest spot hasn’t looked like one at all.
In Other News...
Shanahan Just Made Monday Night About More Than Beating Washington
Kyle Shanahans relationship with Dan Quinn goes back to their Atlanta days, when Shanahan served as offensive coordinator under Quinn in 2015 and 2016. As the 49ers prepare to visit Washington on Monday night, Shanahan said the biggest lessons from that stretch went beyond the playbook, with Quinn putting real weight on how a team talks to one another and builds its identity.
That perspective adds another layer to a matchup that already looks lopsided on paper, with San Francisco leading the NFL in point differential and Washington sitting at 1-3-1. It is also a reunion with a coach Shanahan knows well, only now Quinn is guiding the Commanders, which gives this one a little more history than your average cross-country trip. [Read more 🡒]
49ers Get An Early Edge As Commanders Backfield Suddenly Thins
The 49ers got an early break in the lead-up to their meeting with Washington, as the Commanders backfield took a hit before the matchup even arrived. Jacory Croskey-Merritt, the rookie who has given Washington a useful spark this season with 239 rushing yards and two touchdowns, has been ruled out because of a groin injury, trimming one of the more intriguing pieces of the Commanders run game.
Washington still has options, of course, with Rachaad White and Austin Ekeler expected to carry more of the load. The bigger question now is how the Commanders fill out the rest of that group for game day, and whether the added uncertainty forces them to shuffle more than they would like before facing a 49ers defense that will already be focused on controlling the line of scrimmage. [Read more 🡒]
Renardo Green Is Giving The 49ers Defense Something It Needed
Renardo Green has become one of the more encouraging developments for the 49ers defense this season, giving San Francisco a young corner who is starting to look much more comfortable in Raheem Morris system. His growth has shown up in the numbers, too, with Green standing out among the teams cornerbacks in passes defended and ball hawk rate, a sign that he is not just hanging around plays but consistently finding ways to affect them.
The progress has not come out of nowhere, either. Kyle Shanahan pointed to the work Green did before the offseason program even got rolling as a major reason for the jump, and it is the kind of behind-the-scenes preparation that tends to show up once the games start counting. For a defense that always values playmaking on the back end, Green is starting to provide exactly the sort of presence that can change the way opponents test San Francisco. [Read more 🡒]