The NFL no longer has general liability insurance covering head trauma.
There is now also just one carrier willing to provide workers' compensation to NFL teams.
Before concussion litigation roiled the NFL beginning in 2011, at least a dozen carriers occupied the insurance market for pro football, according to industry experts.
While some people have said football will never go away, it is difficult to see how the youth levels can survive without insurance.
Dr. Julian Bailes, Pop Warner's medical director and a member of the NFL's Head, Neck and Spine Committee, told Outside the Lines "insurance coverage is arguably the biggest threat to the sport."
Some insurance industry executives compare the issue to asbestos, an occupational hazard that has cost insurers at least $100 billion.