every rookie pitcher to have an era under 2.5 in a season minimum 20 starts since 1900

Paul Skenes had an ERA of 1.96 in his rookie season when starting 20+ games in 2024.

	NAME	ERA	GS	SEASON	TM	G	W	L	W%	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%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Paul Skenes P. Skenes	1.96	23	2024	PIT	23	11	3	.786	170	0	0	0	133.0	94	29	31	10	32	6	0	0	514	2	11.50	2.17	5.31	0.68	33.1	6.2	0.95	.284	2.10	47	2.44	60	6.36	23.9
2	Jose Fernandez J. Fernandez	2.19	28	2013	MIA	28	12	6	.667	187	0	0	0	172.2	111	42	47	10	58	5	0	5	681	3	9.75	3.02	3.22	0.52	27.5	8.5	0.98	.240	2.45	60	2.72	75	5.79	18.1
3	Bruce Ruffin B. Ruffin	2.46	21	1986	PHI	21	9	4	.692	70	6	0	0	146.1	138	40	53	6	44	1	0	6	600	0	4.31	2.71	1.59	0.37	11.7	7.3	1.24	.276	3.26	64	3.26	87	8.49	7.8
4	Joe Hesketh J. Hesketh	2.49	25	1985	MON	25	10	5	.667	113	2	1	0	155.1	125	43	52	10	45	0	0	2	618	3	6.55	2.61	2.51	0.58	18.3	7.3	1.09	.256	3.01	71	2.93	80	7.24	12.6
5	Fernando Valenzuela F. Valenzuela	2.48	25	1981	LAD	25	13	7	.650	180	11	8	0	192.1	140	53	55	11	61	1	0	4	758	4	8.42	2.85	2.95	0.51	23.7	8.0	1.05	.255	2.57	73	2.44	72	6.55	20.4
6	Mark Fidrych M. Fidrych	2.34	29	1976	DET	31	19	9	.679	97	24	4	0	250.1	217	65	76	12	53	3	2	3	996	6	3.49	1.91	1.83	0.43	9.7	5.3	1.08	.247	2.73	63	3.15	86	7.80	13.7
7	Jon Matlack J. Matlack	2.32	32	1972	NYM	34	15	10	.600	169	8	4	0	244.0	215	63	79	14	71	2	1	14	1,003	7	6.23	2.62	2.38	0.52	16.8	7.1	1.17	.269	2.91	69	2.65	81	7.93	16.5
8	Stan Bahnsen S. Bahnsen	2.05	34	1968	NYY	37	17	12	.586	162	10	1	0	267.1	216	61	72	14	68	2	3	6	1,070	4	5.45	2.29	2.38	0.47	15.1	6.4	1.06	.245	2.42	73	2.64	88	7.27	10.1
9	Jerry Koosman J. Koosman	2.08	34	1968	NYM	35	19	12	.613	178	17	7	0	263.2	221	61	72	16	69	8	0	7	1,058	8	6.08	2.36	2.58	0.55	16.8	6.5	1.10	.260	2.46	70	2.70	96	7.54	3.7
10	Gary Peters G. Peters	2.33	30	1963	CWS	41	19	8	.704	189	13	4	1	243.0	192	63	69	9	68	8	4	2	978	5	7.00	2.52	2.78	0.33	19.3	7.0	1.07	.260	2.56	67	2.34	67	7.11	32.1
11	Mike Garcia M. Garcia	2.36	20	1949	CLE	41	14	5	.737	94	8	5	2	175.2	154	46	51	6	60	2	10		718	1	4.82	3.07	1.57	0.31	13.1	8.4	1.22	.266	2.61	59	2.94	73	7.89	21.3
12	Gene Bearden G. Bearden	2.43	29	1948	CLE	37	20	7	.741	80	15	6	1	229.2	187	62	72	9	106	3	4		935	5	3.13	4.15	0.75	0.35	8.6	11.3	1.28	.242	2.82	60	3.90	99	7.33	0.4
13	Ewell Blackwell E. Blackwell	2.45	25	1946	CIN	33	9	13	.409	100	10	5	0	194.1	160	53	62	1	79	4	5		803	4	4.63	3.66	1.27	0.05	12.5	9.8	1.23	.257	2.87	74	2.70	80	7.41	14.5
14	Milo Candini M. Candini	2.49	21	1943	WSH	28	11	7	.611	67	8	3	1	166.0	144	46	55	3	65	1	5		681	5	3.63	3.52	1.03	0.16	9.8	9.5	1.26	.259	2.98	78	3.04	93	7.81	4
15	Johnny Beazley J. Beazley	2.13	23	1942	SLN	43	21	6	.778	91	13	3	3	215.1	181	51	67	4	73	3	15		890	7	3.80	3.05	1.25	0.17	10.2	8.2	1.18	.246	2.80	63	2.87	82	7.57	15.3
16	Elmer Riddle E. Riddle	2.24	22	1941	CIN	33	19	4	.826	80	15	4	1	216.2	180	54	68	8	59	5	4		884	2	3.32	2.45	1.36	0.33	9.0	6.7	1.10	.235	2.82	62	3.29	89	7.48	9.6
17	Ernie White E. White	2.40	25	1941	SLN	32	17	7	.708	117	12	3	2	210.0	169	56	72	12	70	6	6		866	3	5.01	3.00	1.67	0.51	13.5	8.1	1.14	.238	3.09	64	3.38	88	7.24	11
18	Jim Turner J. Turner	2.38	30	1937	BSN	33	20	11	.645	69	24	5	1	256.2	228	68	80	13	52	0	3		1,031	0	2.42	1.82	1.33	0.46	6.7	5.0	1.09	.240	2.81	66	3.77	101	7.99	-3.1
19	Scott Perry S. Perry	1.98	36	1918	PHA	44	20	19	.513	81	30	3	2	332.1	295	73	97	1	111	2	7		1,342	4	2.19	3.01	0.73	0.03	6.0	8.3	1.22	.256	2.63	70	2.80	97	7.99	4
20	Leon Cadore L. Cadore	2.45	30	1917	BKN	37	13	13	.500	115	21	1	3	264.0	231	72	86	3	63	7	6		1,067	4	3.92	2.15	1.83	0.10	10.8	5.9	1.11	.259	2.93	91	2.33	90	7.88	7.3
21	Frank Miller F. Miller	2.29	20	1916	PIT	30	7	10	.412	88	10	2	1	173.0	135	44	55	4	49	7	7		677	3	4.58	2.55	1.80	0.21	13.0	7.2	1.06	.248	2.86	88	2.57	98	7.02	1
22	Wheezer Dell W. Dell	2.34	24	1915	BKN	40	11	10	.524	94	12	4	1	215.0	166	56	80	5	100	8	12		894	4	3.93	4.19	0.94	0.21	10.5	11.2	1.24	.234	3.35	84	3.34	117	6.95	-11.1
23	Babe Ruth B. Ruth	2.44	28	1915	BSA	32	18	8	.692	112	16	1	0	217.2	166	59	80	3	85	6	3		874	9	4.63	3.51	1.32	0.12	12.8	9.7	1.15	.244	3.31	85	2.81	97	6.86	1.8
24	Rankin Johnson R. Johnson	2.26	27	1914	TOT	32	12	14	.462	84	16	4	0	219.1	180	55	70	7	63	7	3		838	5	3.45	2.59	1.33	0.29	10.0	7.5	1.11	.256	2.87	81	3.04	110	7.39	-8.1
25	Erv Lange E. Lange	2.23	22	1914	CHF	36	12	11	.522	87	10	2	2	190.0	162	47	69	3	55	3	11		781	1	4.12	2.61	1.58	0.14	11.1	7.0	1.14	.251	3.27	74	2.64	96	7.67	1.2