In short, National Broadcast tally board: MLB: 60 NHL: 106 NBA: 165 If we want to start counting what airs on league-owned networks that's going into dicey waters. Largely because those schedules fluctuate and because, if you want to get technical, they run replays and all sorts of other formats to watch games all the time. You want to start counting minutes devoted or what? I washed out the league-owned networks because that's just going down a road impossible to tally. Not to mention those channels are not commonly owned in order for the national broadcast to have all that much meaning.