​The New York Times reported in August the league offered to pay $765 million, but that was quickly rejected by a judge when she felt that amount couldn't pay for every potential cost for the estimated 18,000 retired players during the 65-year lifespan of the agreement.  

Christopher Seeger, the co-lead attorney for the players, says this means, "retired players and their families can rely on the 100 percent guarantee the fund will pay all eligible claims over its 65-year duration." (via USA Today)

For one thing, the proposed deal sets limits on compensation for chronic traumatic encephalopathy — the progressive brain disorder that has gained so much media attention. (Via Los Angeles Times)

Depression, explosive anger and short term memory loss are all symptoms of CTE, which is thought to be caused by the repeated head trauma of concussions. (Via Korngold, Farrell, and Fozdar, 2013)

A 2005 study surveyed approximately 2,500 former NFL players and found 65% had suffered a concussion at some point during their careers. Twenty four percent had suffered three or more. (ViaGuskiewicz et al., 2005

The result of these concussions has often been tragic. According to Ebony Magazine, autopsies after these players' suicides revealed they all suffered from CTE. 

In exchange for not having a cap on the settlement, the NFL also got the right to appeal as many payouts as it wants. (Via Getty Images)

According to Forbes, the attorneys representing the players do foot the bill for most or all of the litigation, with no guarantees of any settlement being made.

However, the site also says players are concerned their attorneys will "double dip" by taking an additional fee according to their retainer agreement. (Via Forbes)