Perkins may not be in the top 5 every year. But over the last 4 years he has to be a top 5 closer. Tons of turnover, people losing their job, getting hurt, etc. 2011 - 2.48 ERA, 9.5 K per 9. 1.23 WHIP. 2 saves (set up guy) 2012 - 2.56 ERA, 10 K per 9, 1.03 WHIP, 16 saves 2013 - 2.30 ERA, 11.1 K per 9, .92 WHIP. 36 saves 2014 - 2.83 ERA, 11.3 K per 9, 1.01 WHIP, 23 saves Regarding the other relievers, most teams end up promoting their best set up guys to closers in time. So if Betances is for real, he will be closing soon for the Yankees and he can establish a track record and enter into the conversation. Set up guys also have the benefit of favorable matchups, versus a closer coming into the 9th regardless of who is coming up, righties, lefties, etc.