You're just reporting the news—you're not usually the one making it. Your sport is spectating, and a lot of your happiness comes from living vicariously through the glory of others.
You'll be expected to at least pretend to be invested in the game you're assigned to, otherwise the people listening might get really angry at you describing their beloved sports heroes as "those guys running around." You'll ideally be emotionally tied to the ups and downs throughout the season, and should your team win The Big One, you'll feel like you had something to do with it.
We suppose there's a certain amount of glory that can be achieved by getting your pre-season predictions right too. Finishing the football season after having predicted a larger percentage of winners than your network's other sportscasters makes you look like the smart one in the room, and looking like the smart one in the room is half the reason you exist.