RELIEVERS: Best skill sets to date

This week we look at the last 30 days worth of skills. Data sets are small, but you are going to want these lists because the xERA to-date for all but one or two of them is under 3.00. All stats are the past 30 days (as of June 8). The first list is just the closers with a K%-BB% at or over 30% for the past 30 days. 30% is a huge number—and you quickly get a sense of who has been elite:

K%-BB% at 30%+      Sv Hld  IP  xERA WHIP  K%  K-BB% HR/9 xERA'
=================   == === ==== ==== ==== ==== ===== ==== =====
J.Hader (MIL) (L)    7   0  8.3 2.62 0.72  45    39   2.2  2.64
G.Gallegos (STL)     2   1 12.7 2.79 0.95  44    38   1.4  3.50
E.Diaz (NYM)         5   1 10.7 2.28 1.50  43    33   0.8  2.26
C.Kimbrel (LA)       6   0 10.3...

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