PHILADELPHIA (AP) A federal appeals court in Philadelphia says it won't reconsider a ruling that upholds the potential $1 billion settlement of NFL concussion claims.

Critics of the plan for retired players had hoped the full court would reconsider the approval granted by a three-judge panel in April. They say the lead players' lawyers traded away compensation for chronic traumatic encephalopathy (ehn-sehf-uh-LAH'-thuh-pee), or CTE, to boost awards for less common problems.

The settlement plan could pay several million dollars to young players with severe neurological diseases, but most ex-players would get far less.

More from FoxSports

The settlement also offers medical monitoring to more than 20,000 retirees for the next 65 years.

The Philadelphia court ruled Wednesday.

The challengers still could appeal to the U.S. Supreme Court.