detroit lions safety Kirby Joseph has become one of the deciders of the emotional and physical tone in the defense, but recent medical opinions have created some troubling uncertainty about his future.
Longtime NFL injury expert during Super Bowl broadcast Dr. David Zhao shared his thoughts on Joseph’s knee situation — and while he made it clear he backed the Lions safety, his assessment was anything but reassuring.
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Why Kirby Joseph’s knee has doctors concerned
Cao, who spent it? Served as NFL team physician for 17 years Now runs a sports injury center, explaining that he heard Joseph was exploring Non-surgical optionsinclude stem cell therapyto manage his knee.
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This detail alone raised red flags.
Zhao Xiaolan emphasized that he has No review of Joseph’s medical recordshe explains that once stem cells enter the conversation, it often signals something more serious than everyday wear and tear.
“This one is a bit risky,” Lions OnSI quoted Chao as saying. “Articular cartilage is the Holy Grail. If you could regenerate it, you’d win a Nobel Prize.”
He likens cartilage to the tread on a tire—once it’s gone, it’s very difficult to replace it. Unlike muscles or ligaments, cartilage has poor blood supplywhich makes healing unpredictable and often incomplete.
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Jadeveon Clowney Comparison—and Why It Matters
To explain the long-term effects, Zhao points out Jadeveon Clowneyhe underwent microfracture surgery early in his career.
Clowney overcame the odds to carve out a long NFL career, but there’s a reason teams were hesitant to give him a long-term contract.
“That’s why he never got a long-term contract,” Zhao said. “Everybody’s always worried about the knees.”
For Joseph, the concern is that discussing stem cells could indicate damage to cartilage loss even beyond the level of microfracture, which Chao describes as “Hail Mary” territory.
what does this mean for lions
The most sobering part of Cao’s analysis isn’t about next season, but everything after next season.
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“I hope I’m wrong,” Zhao said. “But to say he’s going to fulfill this contract and get another contract, that’s a Hail Mary.”
That doesn’t mean Joseph can’t play. In fact, Cao suggested that if Detroit can get another strong season or two, that would be considered a win in this scenario.
Still, that’s much shorter than anyone would like for a 25-year-old All-Pro safety.
Kirby Joseph and Detroit’s clutch moments
For the Lions, this adds another layer to an already complex roster puzzle. Joseph is a core defensive leader, but the knee cartilage issue isn’t about optimism or toughness, it’s about biology.
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None of this is certain, and medicine is still evolving. But as Chao makes clear, once cartilage damage reaches this stage, there is very little room for error.
The Lions and their fans will be watching closely, hoping Joseph can overcome the odds.
Because if he does, it won’t just be a comeback.
This would be a medical victory.
This article, Doctors sound alarm bells about Kirby Joseph’s long-term future , first appeared on Detroit SportsNation.
