Not his job, and quite frankly very tough to change someone's personality. Chubba is already coming here knowing how competitive the room is. That in itself tells me he is a competitor and confident in his abilities.
What Whip needs to do is teach this room how to prepare, to trust their instincts, to teach them the proper mechanics; along with many other things they weren't taught under Verdu. But most importantly, to make practice hard so the games are easy from a preparation standpoint. If he succeeds there, we will be in very good shape.