The NFL Players Association is facing a concussion lawsuit from former NFL players Christian Ballard and Gregory Westbrooks.
The lawsuit includes as defendants former NFL Players Association presidents Trace Armstrong, Troy Vincent and Kevin Mawae.
They filed the lawsuit in Missouri federal court.
The NFLPA has issued a statement responding to the lawsuit.
"It erroneously alleges that the NFLPA knowingly and fraudulently concealed from players the risks of head injuries players faced by playing in NFL games and practices over the last several decades," the NFLPA said in a statement. "This lawsuit has no merit and we will defend our union and our past Presidents. The NFLPA has made the health and safety of its members a priority and the advancements in professional football on concussion education, prevention and treatment are a result of our efforts."
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Aaron Wilson covers the Ravens for The Baltimore Sun