"Why would we? I doubt you're going to go telling all our plays to our opponents." He may not know Korra well enough to have reason to believe the best of her, but Chouji isn't very good at suspicion. He'll trust people until proven otherwise. Besides, Korra is some sort of cousin to Shikamaru, he's fairly certain. He comes a little closer so she doesn't have to shout.

"You're a football fan?"