Ok still, there isn't much initial evidence out there that Flores was denied HC opportunities by those NFL teams because of race. There could be something that is found during discovery but so far there is not much there.
I would also find it difficult to see how a court would certify this is as a class action. For class actions to work, there needs to be a large number of plaintiffs treated the same way by each of the defendants. Here, there is only one plaintiff (Flores) and others plaintiffs have not joined the suit. In any event, let's say 10 other black coaches join in the suit, each one of them having a different grievance against a different set of NFL clubs. Every case of alleged racial discrimination by them would be unique and the court would not likely certify the class, forcing the plaintiffs to file individual lawsuits or do so as joint plaintiffs. This is different than say a Massachusetts company contaminating drinking water in Woburn, MA, where every town resident has the same grievance against the company. My 2 cents.