Your call Joe
Joe it is one thing to make a comment about someone to other players, but when an employee of a casino says something on national TV about you, yes I think there are grounds for legal action.
Remember I had scheduled tournaments down here in Texas (this passed January) and had them canceled by police interference (Chief Mendoza of Ft. Worth). I had gotten the okay through the mayors office, DA's, special events planner, and Convention & Visitors bureau before ever starting my events almost a year before I scheduled them. Yet Mendoza didn't want them so he stepped in (over stepping his boundaries) and made comments about me and the tournaments.
I got an attorney to go after the Hotel (breech of contract), the police (for interference), and Chief Mendoza for the letter he wrote to others and me about my tournaments. Funny thing is now they are hosting tournaments around town for the Fire and Police departments. I guess if they make money it is legal, but when I give 100% back it's not, (in Mendoza's mind anyway).
As for you fighting a casino it will be tough, but you were slandered so I would check with an attorney. You might just go after Matt and leave the Station casinos out of any lawsuit, (sueing a casino may not help you get into other properties).
If a attorney is willing to do it on a contingency go for it, if not it will cost you lots of money while they drag it out for a long time so bottom line is it's your call.
Good luck, if it helps I voted "Yes" they are libel!