49ers’ Substation Injury Theory Refuses to Die, Even After Being Debunked

The San Francisco 49ers have heard the science. An independent expert hired by the team found nothing linking their electrical substation to the rash of injuries that has plagued the roster for years. The NFL’s own chief medical officer downplayed the connection back in January. General manager John Lynch has called it a “big nothing burger.”

None of that has made the theory go away. And with training camp already producing another wave of injuries, the whispers around the 49ers substation are as loud as ever.

NFL insider Mike Florio addressed the situation directly in a new piece for Pro Football Talk, arguing that facts don’t matter much once a belief takes hold in a locker room.

“For the 49ers, the fact that the substation isn’t a factor in injuries is immaterial to the reality that too many people think it is. The only viable solution is to get the hell away from the thing,” Florio wrote.

That’s not just a throwaway line. It also happens to line up with something the team is already exploring for entirely separate reasons.

A Facility Move Was Already in the Works

Back in June, The Athletic’s Vic Tafur reported that 49ers CEO Al Guido said the team is exploring a possible relocation of its practice facility. The driving factor, according to Guido, is space — not electromagnetic fields. San Francisco has operated out of the same Santa Clara site since 1988, and the footprint around Levi’s Stadium has gotten tight.

“Everything is geared to winning the Super Bowl,” Guido told The Athletic.

Whatever the motivation, a new location would carry a side effect Florio is banking on: it would finally put the substation question to bed. If the 49ers keep getting hurt at the same rate somewhere else, the theory dies. If the injuries taper off, plenty of people will draw their own conclusions regardless of what the science says.

Camp Has Already Been Brutal

The timing makes the debate impossible to ignore. San Francisco has been chewed up by injuries again in the early days of 2026 training camp. Wide receiver Ricky Pearsall is done for the season after undergoing surgery on a lingering PCL injury in his right knee, an issue that dated back to Week 4 of last year. He shared a message on social media after the procedure, writing that he was ready for “every early morning” and “every setback” ahead of a recovery timeline that could stretch nine months.

Pearsall’s loss forced San Francisco to move fast, re-signing veteran receiver Deebo Samuel to fill the void.

He hasn’t been alone. At one point, the 49ers finished a practice without 20 players from their 90-man roster, according to The Athletic’s Matt Barrows. Defensive lineman Sam Okuayinonu went down with an apparent ankle injury that same week. Receiver Mike Evans has dealt with a quad strain. Pass rusher Nick Bosa, still working back from a torn ACL, has missed extended stretches with soreness. Even head coach Kyle Shanahan has been managing his own recovery from a car accident in July, on top of everything happening on the field.

Quarterback Brock Purdy has stayed mostly upright through all of it, but he’s throwing behind a shorthanded offensive line. The Athletic’s Vic Tafur flagged the left guard spot as a specific concern this week, even as Purdy delivered strong outings in team drills against Tennessee in joint practices.

Why the Theory Won’t Quit

Part of the stubbornness comes down to timing and repetition. The 49ers have ranked among the NFL’s most-injured teams in the majority of recent seasons, and soft-tissue injuries in particular — torn ACLs, Achilles tendons, hamstrings — have piled up across multiple units. When a pattern like that repeats itself year after year, players and fans go looking for a single explanation, even a strange one.

The science doesn’t back it up. Substations emit low-frequency electromagnetic fields, a form of nonionizing radiation also produced by microwaves and cellphones. The World Health Organization has found no evidence connecting that kind of exposure to human tissue damage. San Francisco’s own hired expert reached a similar conclusion. Even Seahawks tight end Eric Saubert, who spent 2024 with the 49ers, has described the substation as more of a locker-room punchline than a genuine fear.

None of that erases the frustration inside the building. Injuries have cost San Francisco a real shot at a Super Bowl before, and until the team finds a way to keep players on the field, the questions — fair or not — aren’t going anywhere.

49ers Recent Camp Injury Snapshot

For now, the 49ers are left managing two problems at once: a genuine injury crisis and a theory about its cause that refuses to fade, no matter how many experts weigh in.