The Colorado Rockies allowed their most runs in a game versus the Cubs on August 18, 1995, with 26 runs.

Interpreted as:

most runs allowed in a regular-season game by rockies

	TEAM	R	DATE	TM		OPP	RESULT	ERA	SO	SHO	SV	IP	H	ER	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Rockies	26	8/18/1995	COL	vs	CHC	L 7-26	26.00	8	0	0	9.0	27	26	3	6	0	0	60	0	8.00	6.00	1.33	3.00	13.3	10.0	3.67	.558	26.00	27.00
2	Rockies	25	6/24/2023	COL	vs	LAA	L 1-25	25.00	3	0	0	9.0	28	25	5	6	1	0	59	2	3.00	6.00	0.50	5.00	5.1	10.2	3.78	.523	25.00	28.00
3	Rockies	24	5/19/1999	COL	vs	CIN	L 12-24	22.00	8	0	0	9.0	28	22	6	9	0	1	64	0	8.00	9.00	0.89	6.00	12.5	14.1	4.11	.537	24.00	28.00
4	Rockies	23	9/1/2020	COL	vs	SFG	L 5-23	23.00	6	0	0	9.0	27	23	4	5	1	0	59	1	6.00	5.00	1.20	4.00	10.2	8.5	3.56	.535	23.00	27.00
5	Rockies	22	7/21/2001	COL	vs	LAD	L 7-22	22.00	4	0	0	9.0	23	22	4	2	3	1	54	0	4.00	2.00	2.00	4.00	7.4	3.7	2.78	.463	22.00	23.00
6	Rockies	21	5/10/2025	COL	vs	SDP	L 0-21	18.00	4	0	0	9.0	24	18	5	5	0	0	56	1	4.00	5.00	0.80	5.00	7.1	8.9	3.22	.452	21.00	24.00
7	Rockies	21	4/28/1996	COL	vs	MON	L 9-21	21.00	8	0	0	9.0	20	21	3	8	1	0	56	0	8.00	8.00	1.00	3.00	14.3	14.3	3.11	.472	21.00	20.00
8	Rockies	20	8/6/2025	COL	vs	TOR	L 1-20	20.00	6	0	0	9.0	24	20	5	4	2	0	57	0	6.00	4.00	1.50	5.00	10.5	7.0	3.11	.475	20.00	24.00
9	Rockies	20	5/26/2008	COL	@	PHI	L 5-20	21.38	8	0	0	8.0	19	19	2	8	2	0	54	1	9.00	9.00	1.00	2.25	14.8	14.8	3.38	.500	22.50	21.38
10	Rockies	20	6/19/2002	COL	vs	NYY	L 10-20	16.00	7	0	0	9.0	18	16	3	8	3	2	58	0	7.00	8.00	0.88	3.00	12.1	13.8	2.89	.405	20.00	18.00
11	Rockies	20	4/18/1999	COL	vs	ATL	L 5-20	16.00	7	0	0	9.0	24	16	5	6	0	0	58	0	7.00	6.00	1.17	5.00	12.1	10.3	3.33	.475	20.00	24.00
12	Rockies	19	7/15/2019	COL	vs	SFG	L 2-19	18.00	5	0	0	9.0	21	18	4	3	1	0	52	0	5.00	3.00	1.67	4.00	9.6	5.8	2.67	.436	19.00	21.00
13	Rockies	19	9/28/2006	COL	vs	LAD	L 11-19	17.00	7	0	0	9.0	17	17	4	8	1	0	51	0	7.00	8.00	0.88	4.00	13.7	15.7	2.78	.419	19.00	17.00
14	Rockies	19	4/11/1993	COL	vs	MON	L 9-19	15.00	5	0	0	9.0	22	15	4	6	1	0	58	0	5.00	6.00	0.83	4.00	8.6	10.3	3.11	.429	19.00	22.00
15	Rockies	18	7/26/2025	COL	@	BAL	L 0-18	19.13	4	0	0	8.0	18	17	3	6	1	0	47	0	4.50	6.75	0.67	3.38	8.5	12.8	3.00	.455	20.25	20.25
16	Rockies	18	7/2/2002	COL	vs	SFG	L 5-18	18.00	3	0	0	9.0	23	18	7	5	0	1	54	0	3.00	5.00	0.60	7.00	5.6	9.3	3.11	.410	18.00	23.00
17	Rockies	18	4/10/1998	COL	vs	CIN	L 7-18	17.00	5	0	0	9.0	17	17	3	8	1	0	53	1	5.00	8.00	0.63	3.00	9.4	15.1	2.78	.389	18.00	17.00
18	Rockies	18	8/29/1996	COL	vs	CIN	L 7-18	13.00	8	0	0	9.0	17	13	3	6	0	0	50	0	8.00	6.00	1.33	3.00	16.0	12.0	2.56	.424	18.00	17.00
19	Rockies	18	5/30/1993	COL	vs	PHI	L 1-18	18.00	7	0	0	9.0	19	18	6	4	0	1	51	0	7.00	4.00	1.75	6.00	13.7	7.8	2.56	.382	18.00	19.00
20	Rockies	17	4/9/2025	COL	vs	MIL	L 2-17	11.00	6	0	0	9.0	13	11	3	5	0	0	46	0	6.00	5.00	1.20	3.00	13.0	10.9	2.00	.313	17.00	13.00
21	Rockies	17	6/12/2024	COL	@	MIN	L 9-17	19.13	4	0	0	8.0	24	17	2	2	0	0	47	0	4.50	2.25	2.00	2.25	8.5	4.3	3.25	.564	19.13	27.00
22	Rockies	17	7/13/2019	COL	vs	CIN	L 9-17	17.00	8	0	0	9.0	24	17	3	4	0	0	53	1	8.00	4.00	2.00	3.00	15.1	7.5	3.11	.553	17.00	24.00
23	Rockies	17	7/4/2008	COL	vs	FLA	W 18-17	17.00	4	0	0	9.0	22	17	2	6	2	1	56	1	4.00	6.00	0.67	2.00	7.1	10.7	3.11	.476	17.00	22.00
24	Rockies	17	9/28/2002	COL	@	ARI	L 8-17	15.75	4	0	0	8.0	16	14	5	7	1	0	49	0	4.50	7.88	0.57	5.63	8.2	14.3	2.88	.344	19.13	18.00
25	Rockies	17	7/26/1996	COL	vs	CHC	L 4-17	14.00	5	0	0	9.0	17	14	5	5	0	0	50	1	5.00	5.00	1.00	5.00	10.0	10.0	2.44	.343	17.00	17.00