There is something beautiful going on at Busch Stadium this summer. But it’s not something you can stop and watch — it doesn’t come with the price of admission. It happens organically and often behind the scenes, albeit a moment in the dugout caught on camera. In Albert Pujols’ final season, the great slugger has taken an active role in mentoring young players, notably Juan Yepez, the right-handed-hitting rookie. Pujols even asked Yepez to live with him this season, but Yepez had already locked in an apartment. And while Pujols’ numbers have dropped, his wisdom has surely boosted the numbers o…