First off, no one seems to know the station which makes me question this a lot. I doubt it was ESPN Radio 101.3 because something would be on the Dallas page at ESPN, or just EVERY WHERE online. This person makes a good point on these rumors:
Dallas radio reporting that TCU has been invited to the Big East. Grain of salt: a Memphis station reported same re: Memphis this summer
To report this on a Saturday seems a bit fishy, maybe TCU has an invite in the bag and is waiting for the season to end. In the mean time come join out live chat throughout today's games.