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It's not that unheard of. ESPN's Monday Night Football Countdown is 2 hours on top of a sports center that heavily emphasizes MNF whenever its on. Not to mention the MNF telecast has the "Launch" thing that goes on for ~45min so that's close to 4 hours. "NASCAR Raceday" on speed use to be 3 hours BEFORE the network prerace for the actual race. I agree, it's overkill, but nothing new.
8 months ago on CBS Sports Network launching "That Other Pregame Show"