Best April relievers by K-BB% and other filters

April is over and May is here. The first month, there were six relievers with a K%-BB% at or above a whopping 30%, with an xERA under 4.00 and HR/9 at or under 1.0. And of those six, two are already on the IL: Philadelphia Phillies closer Jhoan Duran (RHP, PHI) with an oblique and Atlanta Braves closer Raisel Iglesias (RHP, ATL) with a shoulder. Here are the April numbers:

		SV	HD	IP	xERA	WHIP	K%	K-BB%	HR/9
Miller, Mason	SD	10	0	15.1	1.07	0.59	54%	48%	0.0
Varland, Louis	TOR	4	3	16.0	1.69	1.00	43%	37%	0.0
Duran, Jhoan IL	PHI	5	0	6.2	1.83	0.75	33%	33%	0.0
Iglesias, Raisel IL	ATL	5	0	8.2	2.78	0.69	36%	32%	0.0
Montgomery, Mason LHP	PIT	0	4	12.1	2.80	1.38	41%	30%	0.7
Sabrowski, Erik LHP	CLE	0	12	13.2	3.26	0.95	41%	30%	0.7

San Diego Padres closer Mason Miller (RHP, SD) finally gave up a run. His K% is 54%....

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