Alec Bettinger gave up the most earned runs in a start in 2021, with 11 earned runs against the Dodgers on May 2, 2021.

Interpreted as:

most earned runs in a regular-season start by a player 2021

	NAME	ER	GS	DATE	TM		OPP	DEC	ERA	SO	CG	SHO	SV	IP	H	R	HR	BB	HBP	GF	IBB	TBF	WP
1	Alec Bettinger A. Bettinger	11	1	5/2/2021	MIL	vs	LAD	L	24.75	0	0	0	0	4.0	11	11	2	2	1	0	0	26	1
2	Josh Fleming J. Fleming	10	1	8/11/2021	TBR	@	BOS	L	27.00	3	0	0	0	3.1	11	10	0	6	0	0	2	26	0
3	Sandy Alcantara S. Alcantara	10	1	8/6/2021	MIA	@	COL	L	24.55	1	0	0	0	3.2	10	10	3	2	1	0	0	24	0
4	Jerad Eickhoff J. Eickhoff	10	1	7/27/2021	NYM	vs	ATL	L	27.00	4	0	0	0	3.1	7	10	3	5	1	0	1	23	0
5	Mike Foltynewicz M. Foltynewicz	10	1	7/18/2021	TEX	@	TOR	L	54.00	0	0	0	0	1.2	8	10	4	2	0	0	0	15	0
6	Carlos Martinez C. Martinez	10	1	6/2/2021	STL	@	LAD	L	135.00	1	0	0	0	0.2	6	10	0	4	0	0	0	12	0
7	Anthony DeSclafani A. DeSclafani	10	1	5/23/2021	SFG	vs	LAD	L	33.75	3	0	0	0	2.2	9	10	1	3	0	0	1	19	0
8	Joe Ross J. Ross	10	1	4/19/2021	WSH	vs	STL	L	20.77	5	0	0	0	4.1	8	10	4	3	1	0	1	24	0
9	Tyler Anderson T. Anderson	9	1	9/25/2021	SEA	@	LAA	L	40.50	0	0	0	0	2.0	9	9	1	1	0	0	0	15	0
10	Andrew Albers A. Albers	9	1	9/4/2021	MIN	@	TBR	L	27.00	2	0	0	0	3.0	10	9	4	1	0	0	1	20	0
11	Griffin Jax G. Jax	9	1	8/24/2021	MIN	@	BOS	L	17.36	4	0	0	0	4.2	7	9	3	4	0	0	0	25	1
12	Logan Gilbert L. Gilbert	9	1	8/21/2021	SEA	@	HOU	L	17.36	5	0	0	0	4.2	8	9	2	1	0	0	0	23	1
13	Kyle Hendricks K. Hendricks	9	1	8/12/2021	CHC	vs	MIL	L	20.25	3	0	0	0	4.0	11	9	2	1	1	0	0	25	0
14	J.A. Happ	9	1	7/28/2021	MIN	vs	DET	L	27.00	2	0	0	0	3.0	10	9	0	4	0	0	0	23	0
15	Caleb Smith C. Smith	9	1	7/10/2021	ARI	@	LAD	L	81.00	1	0	0	0	1.0	6	9	3	3	0	0	0	12	0
16	Matt Manning M. Manning	9	1	6/28/2021	DET	@	CLE	L	22.09	2	0	0	0	3.2	9	9	2	0	1	0	0	21	0
17	Mike Minor M. Minor	9	1	6/25/2021	KCR	@	TEX	L	16.20	2	0	0	0	5.0	11	9	0	2	0	0	0	27	0
18	Tyler Anderson T. Anderson	9	1	5/21/2021	PIT	@	ATL	L	16.20	7	0	0	0	5.0	10	9	3	2	0	0	0	27	0
19	J.A. Happ	9	1	5/12/2021	MIN	@	CWS	L	24.30	3	0	0	0	3.1	9	9	1	2	0	0	0	20	1
20	Austin Gomber A. Gomber	9	1	4/26/2021	COL	@	SFG	L	48.60	3	0	0	0	1.2	7	9	0	4	0	0	2	16	0
21	Patrick Corbin P. Corbin	9	1	4/15/2021	WSH	vs	ARI	L	40.50	1	0	0	0	2.0	6	10	3	4	2	0	0	19	0
22	Yu Darvish Y. Darvish	8	1	9/13/2021	SDP	@	SFG	L	18.00	3	0	0	0	4.0	6	8	4	3	0	0	0	21	0
23	Glenn Otto G. Otto	8	1	9/10/2021	TEX	@	OAK	L	21.60	5	0	0	0	3.1	8	8	0	1	2	0	0	20	0
24	Kyle Gibson K. Gibson	8	1	9/3/2021	PHI	@	MIA	L	13.50	4	0	0	0	5.1	8	8	1	2	0	0	1	24	0
25	Matt Manning M. Manning	8	1	9/2/2021	DET	vs	OAK	L	19.64	1	0	0	0	3.2	8	8	2	3	0	0	0	22	0