Shohei Ohtani had the most earned runs per at-bat with 300+ at-bats in 2023, with 0.09.

Interpreted as:

most er/ab by a player 2023 with 300 or more ab

	NAME	ER/AB	AB	ER	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	IP	H	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Shohei Ohtani S. Ohtani	0.09	497	46	2023	LAA	23	10	5	.667	23	3.14	167	1	1	132.0	85	50	18	55	11	0	531	12	11.39	3.75	3.04	1.23	31.5	10.4	1.06	.239	3.41	72	3.99	91	5.80	6.1
2	Luke Raley L. Raley	0.03	357	9	2023	TBR	2	0	0		0	30.38	1	0	0	2.2	11	9	2	0	0	1	19	0	3.38	0.00		6.75	5.3	0.0	4.13	.563	30.38	740	12.25	295	37.13	-2.5
3	Josh Rojas J. Rojas	0.01	314	4	2023	TOT	2	0	0		0	18.00	1	0	0	2.0	6	4	0	1	0	2	13	0	4.50	4.50	1.00	0.00	7.7	7.7	3.50	.545	18.00	407	3.75	88	27.00	0.1
4	Alec Burleson A. Burleson	0.01	315	4	2023	STL	2	0	0		0	21.60	1	0	0	1.2	8	4	1	0	0	2	13	0	5.40	0.00		5.40	7.7	0.0	4.80	.636	21.60	503	9.85	230	43.20	-1.1
5	Martín Maldonado M. Maldonado	0.01	362	4	2023	HOU	1	0	0		0	36.00	0	0	0	1.0	5	4	1	1	1	1	10	0	0.00	9.00	0.00	9.00	0.0	10.0	6.00	.571	36.00	850	22.25	525	45.00	-2
6	Christian Bethancourt C. Bethancourt	0.01	315	3	2023	TBR	1	0	0		0	81.00	0	0	0	0.1	3	3	1	0	0	1	4	0	0.00	0.00		27.00	0.0	0.0	9.00	.667	81.00	1973	42.25	1017	81.00	-1.5
7	Willi Castro W. Castro	0.01	358	3	2023	MIN	3	0	0		0	11.57	0	0	0	2.1	3	3	0	2	0	3	11	0	0.00	7.71	0.00	0.00	0.0	18.2	2.14	.333	11.57	271	5.82	136	11.57	-0.4
8	Jace Peterson J. Peterson	0.01	374	2	2023	TOT	2	0	0		0	9.00	1	0	0	2.0	3	2	1	3	0	2	12	0	4.50	13.50	0.33	4.50	8.3	25.0	3.00	.286	9.00	219	13.25	319	13.50	-2.1
9	Miguel Rojas M. Rojas	0.01	385	2	2023	LAD	3	0	0		0	6.00	0	0	0	3.0	3	2	0	1	1	3	14	0	0.00	3.00	0.00	0.00	0.0	7.1	1.33	.250	6.00	140	5.25	118	9.00	-0.3
10	Lane Thomas L. Thomas	0	628	3	2023	WSH	1	0	0		0	27.00	1	0	0	1.0	3	3	1	0	0	1	6	0	9.00	0.00		9.00	16.7	0.0	3.00	.500	27.00	623	14.25	323	27.00	-1.1
11	Zach McKinstry Z. McKinstry	0	464	2	2023	DET	1	0	0		0	18.00	0	0	0	1.0	3	2	1	0	0	1	6	0	0.00	0.00		9.00	0.0	0.0	3.00	.400	18.00	425	16.25	383	27.00	-1.3
12	Isiah Kiner-Falefa I. Kiner-Falefa	0	326	1	2023	NYY	4	0	0		0	2.25	1	0	0	4.0	4	1	0	0	0	4	16	0	2.25	0.00		0.00	6.3	0.0	1.00	.267	2.25	53	2.75	62	9.00	0.7
13	Rowdy Tellez R. Tellez	0	311	0	2023	MIL	1	0	0		0	0.00	1	0	0	1.0	1	0	0	0	0	1	4	0	9.00	0.00		0.00	25.0	0.0	1.00	.333	0.00	0	1.25	28	9.00	0.3