Share and Follow
The 49ers have fine-tuned their defense with some strategic additions through free agency and the draft. They are optimistic that these enhancements will elevate their ranking from last season’s top 13 to breaking into the top 10.
A crucial factor for achieving this improvement is maintaining player health, an area that proved challenging last year when key players such as Nick Bosa, Mykel Williams, and Fred Warner were sidelined due to injuries.
Fortunately, all three players are on the path to recovery, and their consistent presence on the field would significantly bolster the 49ers’ defensive performance.
Here’s an overview of the 49ers’ defensive lineup following their recent offseason moves:
Defensive end
Starters: Nick Bosa, Mykel Williams
Reserves: Romello Height, Keion White, Sam Okuayinonu, Mikail Kamara, Andrew Farmer, Cameron Sample, William Bradley-King
The skinny: It’s still a jolt realizing the 49ers managed just 20 sacks last year. Not to make excuses but losing Bosa and Williams clearly played a major role. Knee injuries limited Bosa to three games and Williams, their 2025 first-round pick, to nine games. Both are on track to be back in 2026. That will make a massive difference. Height is expected to offer immediate help as a rotational rusher.
Bottom line: If this room stays healthy, there’s no chance the 49ers finish with 20 sacks this year. If they get back to the normal way they pressure quarterbacks, it changes everything about their defense.
Defensive tackle
Starters: Alfred Collins, Osa Odighizuwa
Reserves: CJ West, Evan Anderson, Sebastian Valdez, Bryson Eason, James Thompson Jr., Gracen Halton
The skinny: The addition of Odighizuwa, whom the 49ers acquired in a trade with the Cowboys, adds plenty of punch to their interior pass rush. He has a knack for getting heat on the quarterback, and along with Collins and West, a pair of 2025 draft picks, helps fortify that part of the 49ers’ defense for the interim and future.
Bottom line: The 49ers have done a solid job rebuilding the interior of their defense and in the process laid the groundwork for a young, athletic, productive rotation.
Linebacker
Starters: Fred Warner, Dre Greenlaw
Reserves: Nick Martin, Tatum Bethune, Garret Wallow, Jaden Dugger, Jalen Graham, Milo Eifler, Luke Gifford
The skinny: Much like their defensive line, the 49ers were ravaged by injuries at linebacker. Specifically, Warner. He played just six games due to a dislocated and broken right ankle. Again, that is a personnel loss that teams can’t easily overcome. He’s back, as is Greenlaw, who returns on a one-year contract, and as a result, the 49ers’ linebacker room looks whole again.
Bottom line: This room looks solid with Greenlaw and Warner back in the fold, but Martin can really strengthen this group by stepping up in his second season. Bethune and Wallow also have chances to earn rotational roles.
Cornerback
Starters: Deommodore Lenoir, Renardo Green, Upton Stout
Reserves: Jack Jones, Nate Hobbs, Eli Apple, Darrell Luter Jr., Ephesians Prysock, Siran Neal, Tre Tomlinson, Jakob Robinson, Derrick Canteen
The skinny: The 49ers’ cornerback room took a decidedly Raiders-like look with the additions of Hobbs and Jones, who played well together in Las Vegas. Both have starting experience, but even if they just bolster the depth, it could go a long way. When healthy, Hobbs has been a solid slot cornerback, although staying on the field has been a challenge for him. Green and Stout could have a fight on their hands holding onto their starting jobs.
Bottom line: It remains to be seen how much Jones and Hobbs will affect starter snaps, but their additions clearly bolster the top-to-bottom quality of the 49ers’ cornerback room.
Safety
Starters: Malik Mustapha, Ji’Ayir Brown
Reserves: Marques Sigle, Darrick Forrest, Jalen Stroman, Patrick McMorris
The skinny: Mustapha has developed into a solid starter after being selected in the fourth round, but Brown needs to be more consistent. Could a path open for Sigle to take his job? He played relatively well after being drafted in the fifth round last year.
Bottom line: Again, if the pass rush improves because players stay healthy, it’s going to help the entire defense, including the back end. The personnel is on hand to make it work at a decent clip.