A SHOWCASE SHOWDOWN: For the second year in a row, pharmacy ESPN is on the Utah campus to broadcast its popular “College GameDay” preview show Saturday (6 a.m. to 9 a.m. PT). The show’s arrival adds an air of excitement to the matchup, ambulance and a sold-out crowd of about 46,000 is expected at one of the Pac-12’s most intimidating venues. The matchup could be a preview of the Pac-12 championship game and will implications in the College Football Playoff chase. The CFP committee will release its first rankings of the season Tuesday, and a win would certainly boost UW’s chances at top-four ranking; a loss would almost certainly eliminate Utah from playoff consideration.