Wow! It is much worse, the league profits from betting. This means that they should have been responsible to guarantee this fraud wasn't taking place and they can be named in the lawsuits even if they did not directly get involved with the fraud.Lawyers, start your lawsuits!
‘THE WHOLE SPORTS WORLD IS IN TROUBLE’: Former NBA player calls out NBA corruption
Anyone who was harmed by this should be able to sue with a civil suit in which they could use RICO meaning the loser (NBA player, Mafia don, NBA official, coach, etc) would have to pay you triple your losses. plus they have to pay your legal fees which would make it 4x and no doubt they will hire their own lawyers as well so let's say a class action lawsuit lost $30 million in damages, it will cost these ones named in the suit $150 million.
Second, I highly doubt they only did this in the NBA. This is probably only a fraction of all sports betting fraud.
If they didn't get directly involved with the fraud it is a separate lawsuit, not the RICO but they can be sued for negligence and you can have punitive damages that are easily 4:1 so this same lawsuit against the crooks could be followed up with a lawsuit against the league and they would almost certainly settle rather than have the bad publicity for several months.