"The NFL has long made player safety a priority. It is continuing to make player safety a priority. And the NFL is not legally responsible for the medical difficulties that some players now are facing," said Karp, whose law firm, Paul, Weiss, Rifkind, Wharton & Garrison, has represented the league in various matters for 20 or so years.
"Head injuries, including concussions and the possible effects of concussions, have long been known risks of playing football," Karp added. "Players have known about the risks of playing football, they have chosen to play football notwithstanding those risks, and in so doing, have assumed those risks and all of their possible consequences."