There are bonafide aces in the NL who are going to be aces in the AL. But those are going to be very cost prohibitive. Sanchez was the Marlins's best pitcher last year, and would probably be a #4 here. The Braves may be a fit, but when you're dealing with a world series contender, you're going to have to give them value for today, not tomorrow. Same for the Giants, could you imagine what Cain would cost? The organization is more likely going to target #3/4 type players.