Peyton Manning will make special ‘College GameDay’ appearance at Tennessee

It’s not going to be Donald Trump, but College GameDay will at least feature one major celebrity appearance. And we’re not talking about guest picker Johnny Knoxville. We’re talking about Peyton Manning. With GameDay traveling to Knoxville for the showdown between the top-ranked Texas Longhorns and Tennessee Volunteers, it’s only natural for Peyton to show up. Not only is…