. >> reporter: for two seasons, george visger gave pretty much everything he had to the n.f.l.l his playing career was cut short by a major concussion and brain surgery. >> major headaches every night, projectile vomiting, i would get a ball of light in front of each eye. >> reporter: visger is one of nearly 6,000 former players left on the sidelines as the n.f.l. owners and players' association negotiate a new labor and benefits contract. two years in the n.f.l., what do you get? >> nothing. >> reporter: no pension? >> nothing. >> reporter: you're not vested? >> no. very few guys are. and even those that are vested draw next to nothing. >> reporter: to collect benefits, players must have been in the league for four years, but just half the 13,000 retired players are eligible for pension and disability coverage. although visger was on the san francisco 49ers team that won the super bowl in 1982, he had to battle the team for five years to cover his medical expenses for nine surgeries. >> they opened me up back here, there's a tube goes on the side of my neck. >> reporter: brain