Everyone talks about the importance of not having a minor leaguer have to be sent back down after a subpar rookie performance. When did this become such a bad thing? Why is this taboo?

Ryan Braun's and Evan Longoria's are not your typical rookie experience. It takes a rookie time, typically, to adjust to the major league level. If a rookie has a difficult time, what's the big deal with some more seasoning in the minors and another call up?

If it wasn't such a big deal, then everyone wouldn't have to talk about whether it'll somehow magically ruin the talent of someone like Jason Heyward. "Whoops, he had a bad first month, can't send him down because now he'll be terrible forever!" Does anyone have any stats or thoughts on this?

I say bring Heyward up, let's see if he's wasting his talent in the minors, and if he needs seasoning, then send him back down.