player lowest era, whip, season, 2018, min 15 ip

J.B. Wendelken had the best ERA with 15.0+ innings pitched in 2018, with an ERA of 0.54 in his rookie season.

	NAME	ERA	WHIP	IP	SEASON	TM	G	W	L	W%	GS	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	J.B. Wendelken	0.54	0.78	16.2	2018	OAK	13	0	0		0	14	0	0	0	8	1	1	1	5	0	3	0	62	1	7.56	2.70	2.80	0.54	22.6	8.1	.167	0.54	13	3.16	77	4.32	1.8
2	Blake Treinen B. Treinen	0.78	0.83	80.1	2018	OAK	68	9	2	.818	0	100	0	0	38	46	7	12	2	21	1	58	3	315	6	11.20	2.35	4.76	0.22	31.7	6.7	.230	1.34	19	1.81	44	5.15	21
3	Jeremy Jeffress J. Jeffress	1.29	0.99	76.2	2018	MIL	73	8	1	.889	0	89	0	0	15	49	11	12	5	27	1	24	4	299	4	10.45	3.17	3.30	0.59	29.8	9.0	.249	1.41	32	2.78	68	5.75	10.9
4	Oliver Perez O. Perez	1.39	0.74	32.1	2018	CLE	51	1	1	.500	0	43	0	0	0	17	5	6	1	7	2	1	3	120	1	11.97	1.95	6.14	0.28	35.8	5.8	.239	1.67	32	1.73	41	4.73	9
5	Brandon Morrow B. Morrow	1.47	1.08	30.2	2018	CHC	35	0	0		0	31	0	0	22	24	5	5	2	9	1	30	0	122	1	9.10	2.64	3.44	0.59	25.4	7.4	.278	1.47	37	2.96	74	7.04	3.6
6	José Leclerc J. Leclerc	1.56	0.85	57.2	2018	TEX	59	2	3	.400	0	85	0	0	12	24	10	16	1	25	3	21	1	223	2	13.27	3.90	3.40	0.16	38.1	11.2	.211	2.50	34	1.89	43	3.75	15.5
7	Sean Doolittle S. Doolittle	1.60	0.60	45.0	2018	WSH	43	3	3	.500	0	60	0	0	25	21	8	8	3	6	2	35	1	163	1	12.00	1.20	10.00	0.60	36.8	3.7	.196	1.60	39	1.89	46	4.20	11.1
8	Ryan Brasier R. Brasier	1.60	0.77	33.2	2018	BOS	34	2	0	1.000	0	29	0	0	0	19	6	6	2	7	0	5	0	124	1	7.75	1.87	4.14	0.53	23.4	5.6	.198	1.60	36	2.83	68	5.08	5.1
9	Vidal Nuno V. Nuno	1.64	1.03	33.0	2018	TBR	17	3	0	1.000	0	29	0	0	0	24	6	7	5	10	2	8	3	134	0	7.91	2.73	2.90	1.36	21.6	7.5	.216	1.91	40	4.46	110	6.55	-1.6
10	James Sherfy J. Sherfy	1.65	1.10	16.1	2018	ARI	15	0	0		0	17	0	0	0	8	3	3	1	10	2	3	1	69	0	9.37	5.51	1.70	0.55	24.6	14.5	.179	1.65	41	4.07	102	4.41	-0.2
11	Jacob deGrom J. deGrom	1.70	0.91	217.0	2018	NYM	32	10	9	.526	32	269	1	0	0	152	41	48	10	46	5	0	3	835	2	11.16	1.91	5.85	0.41	32.2	5.5	.281	1.99	44	1.98	50	6.30	49
12	Tony Sipp T. Sipp	1.86	1.03	38.2	2018	HOU	54	3	1	.750	0	42	0	0	0	27	8	8	1	13	1	8	0	151	2	9.78	3.03	3.23	0.23	27.8	8.6	.277	1.86	45	2.41	58	6.28	7.6
13	Blake Snell B. Snell	1.89	0.97	180.2	2018	TBR	31	21	5	.808	31	221	0	0	0	112	38	41	16	64	1	0	2	700	13	11.01	3.19	3.45	0.80	31.6	9.1	.241	2.04	46	2.94	72	5.58	23.1
14	Richard Bleier R. Bleier	1.93	1.22	32.2	2018	BAL	31	3	0	1.000	0	15	0	0	0	36	7	7	0	4	1	4	1	133	1	4.13	1.10	3.75	0.00	11.3	3.0	.319	1.93	45	2.70	61	9.92	6
15	Jared Hughes J. Hughes	1.94	1.02	78.2	2018	CIN	72	4	3	.571	0	59	0	0	7	57	17	17	4	23	2	23	2	298	5	6.75	2.63	2.57	0.46	19.8	7.7	.252	1.94	47	3.27	78	6.52	7.8
16	Edwin Díaz E. Díaz	1.96	0.79	73.1	2018	SEA	73	0	4	.000	0	124	0	0	57	41	16	17	5	17	6	65	0	280	3	15.22	2.09	7.29	0.61	44.3	6.1	.281	2.09	48	1.60	38	5.03	21.3
17	Hyun Jin Ryu H. Jin Ryu	1.97	1.01	82.1	2018	LAD	15	7	3	.700	15	89	0	0	0	68	18	23	9	15	1	0	1	324	0	9.73	1.64	5.93	0.98	27.5	4.6	.281	2.51	51	3.00	75	7.43	9.4
18	Collin McHugh C. McHugh	1.99	0.91	72.1	2018	HOU	58	6	2	.750	0	94	0	0	0	45	16	18	6	21	5	18	0	283	0	11.70	2.61	4.48	0.75	33.2	7.4	.248	2.24	49	2.71	65	5.60	11.7
19	T.J. McFarland	2.00	1.19	72.0	2018	ARI	47	2	2	.500	0	42	0	0	1	64	16	18	4	22	0	21	3	292	2	5.25	2.75	1.91	0.50	14.4	7.5	.268	2.25	49	3.63	91	8.00	2.8
20	Clay Buchholz C. Buchholz	2.01	1.04	98.1	2018	ARI	16	7	2	.778	16	81	1	0	0	80	22	25	9	22	3	0	1	393	1	7.41	2.01	3.68	0.82	20.6	5.6	.255	2.29	50	3.46	87	7.32	5.7
21	Adalberto Mejia A. Mejia	2.01	1.16	22.1	2018	MIN	5	2	0	1.000	4	13	0	0	0	17	5	5	1	9	2	1	0	92	2	5.24	3.63	1.44	0.40	14.1	9.8	.239	2.01	47	4.05	96	6.85	0.4
22	Keynan Middleton K. Middleton	2.04	1.30	17.2	2018	LAA	16	0	0		0	16	0	0	6	14	4	4	1	9	1	9	1	71	1	8.15	4.58	1.78	0.51	22.5	12.7	.295	2.04	48	3.78	88	7.13	1
23	Matt Strahm M. Strahm	2.05	0.98	61.1	2018	SDP	41	3	4	.429	5	69	0	0	0	39	14	16	6	21	3	5	1	245	2	10.13	3.08	3.29	0.88	28.2	8.6	.226	2.35	53	3.35	83	5.72	4.6
24	Chris Sale C. Sale	2.11	0.86	158.0	2018	BOS	27	12	4	.750	27	237	0	0	0	102	37	39	11	34	14	0	0	617	4	13.50	1.94	6.97	0.63	38.4	5.5	.283	2.22	48	1.97	47	5.81	39.2
25	Arodys Vizcaino A. Vizcaino	2.11	1.17	38.1	2018	ATL	39	2	2	.500	0	40	0	0	16	30	9	9	4	15	2	31	1	158	4	9.39	3.52	2.67	0.94	25.3	9.5	.268	2.11	51	3.76	93	7.04	1.1