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The Detroit Lions' safety, Kerby Joseph, has dedicated his entire offseason to rehabilitating a knee injury that he suffered during the 2025 season. As the team placed him on the Physically Unable to Perform list at the start of training camp, there has been mounting concern that his playing days might be numbered.
Dr. Jimmy Liao, a physician who is also a Lions fan and provides injury analysis, has offered detailed insights into the severity of Joseph's condition and the likelihood of his return to the gridiron. Liao emphasized that the issues extend beyond simple pain management, noting that swelling and decreased joint mobility are significant concerns.
“It's not just a pain management issue,” Liao explained. “Swelling can occur, and he's already acknowledged that. With swelling, you get decreased mobility in the joint, and it can't move freely. If this is an articular cartilage issue, the cartilage normally allows bones to glide smoothly, but damage means they don't glide well, leading to friction, heat, pain, swelling, and mechanical symptoms like grinding or locking.”
Joseph has admitted in a recent interview that he couldn't move as fast or be as mobile due to swelling and disability. Liao stressed that simply toughing it out with pain medication is not a viable solution. After an entire offseason of rest and treatment, Joseph's knee has healed as much as it can, and it's now up to the Lions to decide when to increase his activity.
Key Analysis
Liao noted that the Lions' cautious approach is reasonable, as waiting a few more months is unlikely to change the outcome. The team faces no pressure to make a move, with no trades or draft picks available to address the position. The worst-case scenario, according to Liao, is that Joseph experiences pain, swelling, and disability once he ramps up activity, similar to what happened in December. However, this might actually be the best-case scenario for his long-term well-being.
“The best-case scenario for his life may be to early retire and not continue to put impact damage on his knee,” Liao said. “At 25, he has a long, healthy life ahead. He's starting a rap career, so he might consider early retirement to avoid chronic pain and disability. If this were my son or myself, I'd advise against continuing to damage the knee, as you don't want future surgeries or chronic pain.”
The Lions are taking a measured approach, but the ultimate decision on Joseph's future may hinge on how his knee responds to increased activity. For now, the team waits, and Joseph's career hangs in the balance.