(AP) — The NFL’s concussion saga has entered its next phase: litigation.

More than 125 former pro football players are suing the league — and, in most cases, helmet-maker Riddell — via at least five complaints brought in state or federal courts over the past few months and as recently as last week. They say the NFL should have done more to warn about the dangers of head injuries and should do more to help retired players.

“We’ve moved on from a debate about whether or not it’s really a problem — it’s clear it is — to the next question: What do we do about it?” said Richard Lewis, a lawyer representing players in a class-action suit filed in California state court.

There also are at least three personal-injury cases against the NFL pending in California, along with a case filed in U.S. District Court in Pennsylvania.