PokerStars says these kind of asset seizures have always involved payment processors that were acting in a non-transparent manner and hiding information from the company.

FORBES: Billionaire Steve Wynn Makes Big Online Poker Bet With PokerStars

But plaintiffs, led by lawyer David Frederick, said federal court is the appropriate venue for a case accusing the NFL of negligence and fraud, including assembling a "sham committee" in the 1990s to address the head-injury problem and knowingly hiding information from its players on the risks of brain damage from playing football allegations that the NFL flatly denies.

WSJ: NFL Attacks Head-Injury Suit