Ben Casparius has the lowest WHIP by a starting pitcher this season, with a WHIP of 0.38.

Interpreted as:

lowest whip by a starting pitcher this regular season

	NAME	WHIP	SEASON	TM	G	W	L	W%	GS	ERA	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	H/9
1	Ben Casparius B. Casparius	0.38	2025	LAD	1	0	0		1	0.00	4	0	0	0	2.2	1	0	0	0	0	0	0	0	9	0	13.50	0.00		0.00	44.4	0.0	.200	0.00	3.38
2	Joe Boyle J. Boyle	0.40	2025	TBR	1	1	0	1.000	1	0.00	7	0	0	0	5.0	0	0	2	0	2	1	0	0	18	0	12.60	3.60	3.50	0.00	38.9	11.1	.000	3.60	0.00
3	Jack Dreyer J. Dreyer	0.60	2025	LAD	2	0	0		2	2.70	3	0	0	0	3.1	2	1	1	0	0	0	0	0	12	0	8.10	0.00		0.00	25.0	0.0	.222	2.70	5.40
4	Keegan Akin K. Akin	0.60	2025	BAL	1	0	0		1	0.00	1	0	0	0	1.2	0	0	0	0	1	0	0	0	6	0	5.40	5.40	1.00	0.00	16.7	16.7	.000	0.00	0.00
5	Logan Henderson L. Henderson	0.67	2025	MIL	1	1	0	1.000	1	1.50	9	0	0	0	6.0	3	1	1	1	1	0	0	0	21	0	13.50	1.50	9.00	1.50	42.9	4.8	.200	1.50	4.50
6	Huascar Brazobán H. Brazobán	0.67	2025	NYM	2	0	0		2	0.00	4	0	0	0	3.0	0	0	0	0	2	0	0	0	11	0	12.00	6.00	2.00	0.00	36.4	18.2	.000	0.00	0.00
7	Steven Matz S. Matz	0.78	2025	STL	2	1	0	1.000	2	1.00	11	0	0	0	9.0	7	1	1	0	0	0	0	0	34	0	11.00	0.00		0.00	32.4	0.0	.304	1.00	7.00
8	Logan Gilbert L. Gilbert	0.79	2025	SEA	6	1	1	.500	6	2.37	44	0	0	0	30.1	18	8	8	3	6	1	0	0	117	2	13.05	1.78	7.33	0.89	37.6	5.1	.238	2.37	5.34
9	Nathan Eovaldi N. Eovaldi	0.80	2025	TEX	8	3	2	.600	8	2.03	53	1	1	0	48.2	35	11	13	3	4	4	0	0	186	3	9.80	0.74	13.25	0.55	28.5	2.2	.262	2.40	6.47
10	Hunter Greene H. Greene	0.81	2025	CIN	8	4	2	.667	8	2.36	61	0	0	0	45.2	29	12	12	7	8	2	0	0	176	2	12.02	1.58	7.63	1.38	34.7	4.5	.224	2.36	5.72
11	Zach Eflin Z. Eflin	0.83	2025	BAL	3	2	1	.667	3	3.00	8	0	0	0	18.0	14	6	6	2	1	1	0	0	68	0	4.00	0.50	8.00	1.00	11.8	1.5	.214	3.00	7.00
12	Hunter Brown H. Brown	0.88	2025	HOU	7	5	1	.833	7	1.67	49	0	0	0	43.0	28	8	9	1	10	0	0	0	158	0	10.26	2.09	4.90	0.21	31.0	6.3	.276	1.88	5.86
13	Joe Ryan J. Ryan	0.90	2025	MIN	7	2	2	.500	7	2.93	47	0	0	0	40.0	31	13	13	6	5	5	0	0	158	0	10.58	1.13	9.40	1.35	29.7	3.2	.263	2.93	6.98
14	Max Fried M. Fried	0.91	2025	NYY	8	6	0	1.000	8	1.05	47	0	0	0	51.2	36	6	11	3	11	4	0	0	208	2	8.19	1.92	4.27	0.52	22.6	5.3	.231	1.92	6.27
15	Carlos Rodón C. Rodón	0.92	2025	NYY	8	4	3	.571	8	2.96	57	0	0	0	48.2	25	16	18	6	20	0	0	0	188	1	10.54	3.70	2.85	1.11	30.3	10.6	.181	3.33	4.62
16	Bryan Woo B. Woo	0.92	2025	SEA	7	4	1	.800	7	3.25	44	0	0	0	44.1	33	16	16	4	8	1	0	0	174	0	8.93	1.62	5.50	0.81	25.3	4.6	.248	3.25	6.70
17	Kevin Gausman K. Gausman	0.93	2025	TOR	7	2	3	.400	7	3.83	37	0	0	0	40.0	25	17	18	4	12	0	0	1	152	0	8.33	2.70	3.08	0.90	24.3	7.9	.212	4.05	5.63
18	Yoshinobu Yamamoto Y. Yamamoto	0.93	2025	LAD	7	4	2	.667	7	0.90	49	0	0	0	40.0	24	4	7	2	13	0	0	0	153	1	11.03	2.93	3.77	0.45	32.0	8.5	.247	1.58	5.40
19	Spencer Arrighetti S. Arrighetti	0.93	2025	HOU	2	1	1	.500	2	5.59	8	0	0	0	9.2	4	6	6	1	5	1	0	0	39	0	7.45	4.66	1.60	0.93	20.5	12.8	.125	5.59	3.72
20	Pablo López P. López	0.94	2025	MIN	6	3	2	.600	6	2.18	37	0	0	0	33.0	26	8	11	2	5	0	0	0	130	0	10.09	1.36	7.40	0.55	28.5	3.8	.279	3.00	7.09
21	Zack Wheeler Z. Wheeler	0.94	2025	PHI	8	3	1	.750	8	3.35	66	0	0	0	51.0	39	19	19	8	9	2	0	0	198	0	11.65	1.59	7.33	1.41	33.3	4.5	.274	3.35	6.88
22	Nick Pivetta N. Pivetta	0.94	2025	SDP	7	5	1	.833	7	2.01	44	0	0	0	40.1	26	9	10	3	12	0	0	0	155	0	9.82	2.68	3.67	0.67	28.4	7.7	.240	2.23	5.80
23	Paul Skenes P. Skenes	0.95	2025	PIT	8	3	4	.429	8	2.77	47	0	0	0	48.2	34	15	17	4	12	1	0	0	190	1	8.69	2.22	3.92	0.74	24.7	6.3	.238	3.14	6.29
24	Noah Cameron N. Cameron	0.95	2025	KCR	1	1	0	1.000	1	0.00	3	0	0	0	6.1	1	0	0	0	5	0	0	0	25	0	4.26	7.11	0.60	0.00	12.0	20.0	.059	0.00	1.42
25	Matthew Liberatore M. Liberatore	0.95	2025	STL	7	3	3	.500	7	3.07	38	0	0	0	41.0	33	14	15	2	6	0	0	0	160	1	8.34	1.32	6.33	0.44	23.8	3.8	.272	3.29	7.24