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SAN FRANCISCO – The San Francisco 49ers have been plagued by injuries in recent years and there is a theory as to why.
A viral, though unproven, theory says the 49ers’ unusually high number of soft-tissue, non-contact injuries could be due to electromagnetic fields (EMF) from a large electrical substation right next to their practice fields and Levi’s Stadium in Santa Clara.
The claim is that being around it for years could weaken the tendons and soft tissues, leading to more ACL tears, Achilles tendon injuries, hamstring pulls, and similar problems.
Christian McCaffrey, George Kittle, Ricky Pearsall, Brock Purdy, Dre Greenlaw and many others have suffered serious injuries in recent years, which has gained momentum in controversy. Greenlaw tore his Achilles tendon in the Super Bowl two years ago, and Kittle tore his Achilles tendon last month in the playoffs.
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Christian McCaffrey of the San Francisco 49ers falls after a tackle during an NFL football game against the Buffalo Bills at Highmark Stadium on December 1, 2024, in Orchard Park, New York. (Kevin Sabitus/Getty Images)
McCaffrey missed all but four games with Achilles tendinitis and a knee injury last season, but he’s not worried in the slightest.
“Dude, I’m not a scientist or a doctor. Look, we’ll play anywhere. You know, for us, I think those are things that a lot of people smarter than me can talk about,” McCaffrey told Pak Gazette Digital on Radio Row. “All I know is that there are too many variables in football to just say something like that is the reason for injuries. I mean, you can do everything right and bad things can still happen, so.”
Purdy remained pretty quiet about the entire situation.
George Kittle of the San Francisco 49ers leaves the field during the second quarter of the NFC Wild Card playoff game against the Philadelphia Eagles at Lincoln Financial Field on January 11, 2026 in Philadelphia, Pennsylvania. (Mitchell Leff/Getty Images)
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“I don’t really know what to think about it. You know, I think people are researching it and all that, but, you know, for me, I have no idea,” he said. “I mean, I’m going to keep practicing there. Obviously it’s my job and I love the Niners. So yeah, I have no choice.”
Linebacker Fred Warner, who missed time this season, had a rather different feeling. “He’s ignoring it for now,” but said he thinks some investigation may need to be done.
“I think, of course, since it’s been such a hot topic, there will be more research done on it to see exactly if anything comes out of it. But I think it’s been there for so long that, of course, we had the injuries that we had last season, especially to the high-profile players. So, basically, it was like a hot topic, and we’ll see what comes of it,” Warner said.
Fred Warner of the San Francisco 49ers is taken off the field after being injured during the first quarter against the Tampa Bay Buccaneers in the game at Raymond James Stadium on October 12, 2025 in Tampa, Florida. (Mike Ehrmann/Getty Images)
The 49ers have said they will investigate what has caused the increase in injuries, including the electromagnetic field theory.
