Dallin may be a world class tool, but he’s also a pro football player.
The NFL is a dog eat dog world and film study is often crucial in the league, particularly for a guy like Leavitt whose physical talents aren’t overwhelming to the point where they could carry him.
Wouldn’t be too hard for a guy like that to pick up on tendencies and be able to confirm them if he’s sitting with a key player from the opposing team on the regular.
If that was in fact happening, Dallin would’ve been in a great position to get his quarterback brother ready to play BYU.
I have not the slightest clue whether any of that took place.