Sounds like it’s time to bust out my orthopedic degree I’ve earned reading ChatGPT.
Johnson’s main stabilizing ligament in the center of the knee, the ACL (anterior cruciate ligament), may be stretched or torn.
Other ligaments like the PCL, MCL, or LCL may also be injured, depending on the direction and force of the injury.
Johnson might also have injury to the meniscus (the cartilage that cushions the joint) or the smooth cartilage lining the bones.
In more serious cases, the joint capsule or blood vessels behind the knee could be affected. In short, this could be catastrophic or he could be ok. I’m not taking any questions, sorry.