But the courts should easily be able to see that the casino was also in the wrong here and if they believed this wager was invalid, they had more than ample time to void it, but instead waited to see if it would lose to collect
The question then becomes, is a book obligated to watch for people attempting to work around the rules and THEN void their bets
in advance of play? A book would say, its not their obligation to do so.
I'm betting a court would say, it is the bettor's responsibility to know the rules and adhere to them when placing bets. If the book rules state you forfeit bets that are not in compliance, you lose your bet win or lose.
A casino could also argue, "We only watch for "illegal" play on winning bets and ignore losing bets since the winning bets are where our risk lies."
Unless a judge determines the sports book rules are unfair or invalid, I don't see how this guy is going to win his case.