RELIEVERS: Elite skills in April and May

This week, the column filters the top twenty skills relievers and finds about half are closers. Let's examine those first.

Here are the top skills closers, temporary closers and quasi-closers so far in 2013:

                   IP   ERA WHIP  Dom  Cmd hr/9  xERA   G/F   BPV pxERA pBPV
================= ==== ==== ==== ==== ==== ====  ==== ======  === ===== ==== 
Kimbrel (ATL)     19.3 2.33 0.93 13.5  7.2  1.4  1.98  47/32  218  1.91  214
K.Jansen (LA)     23.7 3.42 1.10 13.3  5.8  1.5  2.52  38/40  194  2.84  153
Grilli (PIT)      22.7 1.19 0.71 13.5  6.8  0.0  2.40  27/50  194  3.26  122
Tazawa (BOS)      21.3 2.53 1.08 11.4  9.0  1.3  2.71  35/39  184  3.06  133
Perkins (MIN) (L) 16.7 3.24 0.96 14.0  5.2  1.1  2.59  26/50  184  3.36 ...

Almost!

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