One channel to watch them all.
A TV network that shows current sports championships across all sports first and foremost: football, baseball, basketball, hockey, tennis, boxing, MMA, golf, volleyball, car racing, and so on.
Only the championship rounds/games/matches (quarter-, semi-, and finals). No regular season. No early rounds. Just the best if the best vying for the title in every sport imaginable.
Fill in any extra hours without live action, real-time championships with classic games/matches/etc.