16 players were tied for the lowest ERA + WHIP in 2021, with 0. The first three are Hanser Alberto, Sergio Alcántara and Seranthony Domínguez.

Interpreted as:

lowest era+whip by a player in 2021

	NAME	ERA+WHIP	ERA	WHIP	SEASON	TM	G	W	L	W%	GS	SO	CG	SHO	SV	IP	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	Hanser Alberto H. Alberto	0	0.00	0.00	2021	KCR	1	0	0		0	0	0	0	0	0.1	0	0	0	0	0	0	1	0	1	0	0.00	0.00		0.00	0.0	0.0	.000	0.00	0	3.16	75	0.00	0
2	Sergio Alcántara S. Alcántara	0	0.00	0.00	2021	CHC	1	0	0		0	0	0	0	0	0.1	0	0	0	0	0	0	1	0	1	0	0.00	0.00		0.00	0.0	0.0	.000	0.00	0	3.16	75	0.00	0
3	Seranthony Domínguez S. Domínguez	0	0.00	0.00	2021	PHI	1	0	0		0	1	0	0	0	1.0	0	0	0	0	0	0	0	0	3	0	9.00	0.00		0.00	33.3	0.0	.000	0.00	0	1.16	27	0.00	0.3
4	Matt Duffy M. Duffy	0	0.00	0.00	2021	CHC	1	0	0		0	0	0	0	0	0.1	0	0	0	0	0	0	0	0	1	0	0.00	0.00		0.00	0.0	0.0	.000	0.00	0	3.16	75	0.00	0
5	Phillip Evans P. Evans	0	0.00	0.00	2021	PIT	1	0	0		0	0	0	0	0	1.0	0	0	0	0	0	0	1	0	3	0	0.00	0.00		0.00	0.0	0.0	.000	0.00	0	3.16	75	0.00	0.1
6	Mike Freeman M. Freeman	0	0.00	0.00	2021	CIN	1	0	0		0	1	0	0	0	0.1	0	0	0	0	0	0	1	0	1	0	27.00	0.00		0.00	100.0	0.0		0.00	0	-2.84	-64	0.00	0.3
7	Marwin Gonzalez M. Gonzalez	0	0.00	0.00	2021	TOT	1	0	0		0	0	0	0	0	1.0	0	0	0	0	0	0	0	0	3	0	0.00	0.00		0.00	0.0	0.0	.000	0.00	0	3.16	73	0.00	0.1
8	Andrew Knapp A. Knapp	0	0.00	0.00	2021	PHI	1	0	0		0	0	0	0	0	0.1	0	0	0	0	0	0	1	0	1	0	0.00	0.00		0.00	0.0	0.0	.000	0.00	0	3.16	73	0.00	0
9	Jack Mayfield J. Mayfield	0	0.00	0.00	2021	TOT	1	0	0		0	0	0	0	0	0.1	0	0	0	0	0	0	1	0	1	0	0.00	0.00		0.00	0.0	0.0	.000	0.00	0	3.16	76	0.00	0
10	Kevin Pillar K. Pillar	0	0.00	0.00	2021	NYM	1	0	0		0	0	0	0	0	0.1	0	0	0	0	0	0	1	0	1	0	0.00	0.00		0.00	0.0	0.0	.000	0.00	0	3.16	75	0.00	0
11	Kevin Plawecki K. Plawecki	0	0.00	0.00	2021	BOS	1	0	0		0	0	0	0	0	1.0	0	0	0	0	0	0	1	0	3	0	0.00	0.00		0.00	0.0	0.0	.000	0.00	0	3.16	73	0.00	0.1
12	Max Schrock M. Schrock	0	0.00	0.00	2021	CIN	2	0	0		0	1	0	0	0	1.2	0	0	0	0	0	0	2	0	6	0	5.40	0.00		0.00	16.7	0.0	.000	0.00	0	1.96	44	0.00	0.4
13	Pat Valaika P. Valaika	0	0.00	0.00	2021	BAL	2	0	0		0	0	0	0	0	1.1	0	0	0	0	0	0	2	0	5	0	0.00	0.00		0.00	0.0	0.0	.000	0.00	0	3.16	70	0.00	0.2
14	Nick Maton N. Maton	0	0.00	0.00	2021	PHI	1	0	0		0	1	0	0	0	0.1	0	0	0	0	0	0	1	0	1	0	27.00	0.00		0.00	100.0	0.0		0.00	0	-2.84	-66	0.00	0.3
15	Nick Allgeyer N. Allgeyer	0	0.00	0.00	2021	TOR	1	0	0		0	0	0	0	0	1.0	0	0	0	0	0	0	1	0	3	0	0.00	0.00		0.00	0.0	0.0	.000	0.00	0	3.16	75	0.00	0.1
16	Romy González R. González	0	0.00	0.00	2021	CWS	1	0	0		0	1	0	0	0	0.1	0	0	0	0	0	0	1	0	1	0	27.00	0.00		0.00	100.0	0.0		0.00	0	-2.84	-64	0.00	0.3
17	AJ Ramos	0.43	0.00	0.43	2021	LAA	4	0	0		0	3	0	0	0	4.2	0	0	0	0	2	0	3	0	16	0	5.79	3.86	1.50	0.00	18.8	12.5	.000	0.00	0	3.16	72	0.00	0.6
18	Devin Smeltzer D. Smeltzer	0.43	0.00	0.43	2021	MIN	1	0	0		0	3	0	0	0	4.2	1	0	1	0	1	2	1	0	17	0	5.79	1.93	3.00	0.00	17.6	5.9	.091	1.93	0	3.81	90	1.93	0.2
19	Hernan Perez H. Perez	0.5	0.00	0.50	2021	WSH	2	0	0		0	2	0	0	0	2.0	1	0	0	0	0	0	2	0	7	0	9.00	0.00		0.00	28.6	0.0	.200	0.00	0	1.16	27	4.50	0.7
20	Yefry Ramirez Y. Ramirez	0.5	0.00	0.50	2021	LAD	1	0	0		0	2	0	0	0	2.0	0	0	0	0	1	0	1	0	6	0	9.00	4.50	2.00	0.00	33.3	16.7	.000	0.00	0	2.66	62	0.00	0.4
21	Luis Severino L. Severino	0.5	0.00	0.50	2021	NYY	4	1	0	1.000	0	8	0	0	0	6.0	2	0	0	0	1	1	1	0	22	0	12.00	1.50	8.00	0.00	36.4	4.5	.167	0.00	0	1.50	35	3.00	1.9
22	Andrew Vasquez A. Vasquez	0.6	0.00	0.60	2021	LAD	2	0	0		0	3	0	0	0	1.2	1	0	1	0	0	0	1	0	6	0	16.20	0.00		0.00	50.0	0.0	.333	5.40	0	-0.44	-10	5.40	0.9
23	Asdrubal Cabrera A. Cabrera	0.75	0.00	0.75	2021	TOT	2	0	0		0	0	0	0	0	1.1	1	0	0	0	0	0	1	0	4	0	0.00	0.00		0.00	0.0	0.0	.250	0.00	0	3.16	77	6.75	0.1
24	Angel Zerpa A. Zerpa	0.8	0.00	0.80	2021	KCR	1	0	1	.000	1	4	0	0	0	5.0	3	0	2	0	1	0	0	0	20	0	7.20	1.80	4.00	0.00	20.0	5.0	.200	3.60	0	2.16	51	5.40	1.2
25	Tommy Hunter T. Hunter	0.88	0.00	0.88	2021	NYM	4	0	0		1	6	0	0	0	8.0	4	0	0	0	3	1	0	0	33	1	6.75	3.38	2.00	0.00	18.2	9.1	.174	0.00	0	3.16	75	4.50	0.9