More than 100 former players say they were n't warned of head injury " . In contrast , Frederick argued passionately that the NFL does not have immunity in all cases , especially those players who played while collectively bargaining agreements were in limbo from 1987 to 1993 . A judge has delayed ruling on the NFL 's appeal . The NFL want damages , treatment and medical monitoring . Researchers are making strides in the study of the brain disease CTE .
More than 100 former players say they were n't warned of head injury " . A judge has delayed ruling on the NFL 's appeal . The NFL want damages , treatment and medical monitoring . Researchers are making strides in the study of the brain disease CTE .