Felix is actually not as bad a comparison to Cabrera as some may think, from strictly a numbers standpoint to this point in their careers. Neither guy was putting up particularly special numbers leading up to his breakout AA season. But there are a couple of things working against your plan. First of all, as far as I can tell, Pie is still out with an injury that he suffered a couple weeks ago. Plus, his numbers, while very solid, were significantly less than Cabrera's breakout AA season. *And finally, Pie is not a great leadoff candidate. His walk rates are not that high, and his OBP is dominated by his AVG. Even a slight drop in AVG, which would be expected going from AA to the majors, would equate to a lackluster OBP, certainly not anything we can dub "the answer" to leadoff*. And on top of that, Cabrera was eased into the backend of a lineup that wasn't having any problems getting guys on base at the top. Calling up Pie, a relatively less accomplished prospect, to fill a major hole in this lineup, would be quite different than the situation Cabrera was in. *Just to tie it in with the Cabrera comparison, Miguel was hitting .365/.429/.609 at AA when he was called up. He was used primarily in the 7 hole, and ended up with a line of .268/.325/.468, close to a 25% decline across the board. If Pie came up and experienced similar declines from his AA numbers to the majors, we could expect something like .228/.261/.415. Even if his decline was much less dramatic than Miggy's, he's still likely be significantly below anything we could consider season saving. It's not worth the risk at this point of losing such a talented player.