Aroldis Chapman

Paying the premium for a closer isn't advised, because replicating that success from year to year - especially for breakout pitchers at the position - is tough to do. But when you have a closer who has been a top-tier option year after year, he's one of the few who are worth the investment. Chapman isn't the lights-out closer that he was in the past, but he's as safe of a bet that there is to finish top 3 at the position. That, alone, makes him worth the price.