My questions along this line. If Tech was on OLe MIss or MSU schedule for a home game could OLe MIss or MSU bring a lawsuit prohibiting their QB from playing in the game in the state of Mississippi? Could the owners of the sport book or casinos?
If Ole Miss or MSU brought a lawsuit trying to force the NCAA to enforce its eligibility rules in the state of Mississippi, then the courts could issue an injunction against the NCAA that makes it impossible for them to comply with the Texas court order and the Mississippi order. Generally they won't do that. There is an expectation of comity between the courts of equal jurisdiction, and the general expectation is that when either state court could have validly ruled on a matter, the court receiving the matter second will defer to the court receiving the matter first. That said, these cases are obviously driven by politics, not law, so maybe a chancellor would do that (probably less likely as Ole Miss probably picked their most homerish chancellor for the Chambliss injunction, and he is not going to want to throw a stone from a glass house on the issue; but if Ole Miss hadn't already blown that wad, and playing Texas Tech was implicating their playoff chances, then maybe). And Mississippi would have a plausible argument for why it should do it, with legalized gambling and sports books, it does have a particular interest in not having players gambling on their own games.
But in short, no, there's no real possibility.