The St. Louis Cardinals had the most runs by an NL team in a loss in 1934, with 15 runs against the Reds on July 6, 1934.

Interpreted as:

most runs by an nl team in a regular-season loss in 1934

	TEAM	R	L	DATE	TM		OPP	RESULT	W	L%	AB	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	GIDP	AVG	OBP	SLG	OPS
1	Cardinals	15	1	7/6/1934	SLN	vs	CIN	L 15-16	0	1.000	43	16	5	1	1	15	11	0	9	0	0	54	26	7	0	0	.372	.500	.605	1.105
2	Phillies	13	1	7/6/1934	PHN	vs	BSN	L 13-16	0	1.000	45	18	8	0	1	12	4	0	3	0	0	49	29	9	0	1	.400	.449	.644	1.093
3	Braves	11	1	7/5/1934	BSN	@	PHN	L 11-14	0	1.000	44	17	2	0	2	11	5	0	2	0	0	49	25	4	0	1	.386	.449	.568	1.017
4	Pirates	10	1	7/22/1934	PIT	@	BKN	L 10-13	0	1.000	43	15	2	2	1	9	4	0	3	0	0	47	24	5	0	0	.349	.404	.558	.962
5	Braves	10	1	7/7/1934	BSN	@	PHN	L 10-11	0	1.000	38	12	4	0	3	10	6	2	1	0	0	46	25	7	0	1	.316	.435	.658	1.093
6	Reds	10	1	6/20/1934	CIN	vs	PHN	L 10-15	0	1.000	45	16	6	0	0	9	2	1	2	0	0	48	22	6	0	0	.356	.396	.489	.885
7	Dodgers	10	1	6/5/1934	BKN	@	PHN	L 10-11	0	1.000	39	15	2	2	1	9	4	0	1	0	0	44	24	5	1	2	.385	.442	.615	1.057
8	Reds	9	1	8/24/1934	CIN	vs	BSN	L 9-10	0	1.000	41	16	0	4	1	9	2	0	3	0	0	44	27	5	1	2	.390	.419	.659	1.077
9	Cardinals	9	1	8/19/1934	SLN	vs	BSN	L 9-10	0	1.000	43	17	8	1	1	9	3	0	2	0	0	46	30	10	0	1	.395	.435	.698	1.132
10	Dodgers	9	1	6/16/1934	BKN	@	CIN	L 9-10	0	1.000	47	16	1	1	1	9	6	0	6	2	0	54	22	3	1	2	.340	.415	.468	.883
11	Braves	9	1	6/14/1934	BSN	@	SLN	L 9-12	0	1.000	46	18	4	0	0	9	1	1	6	0	0	48	22	4	0	1	.391	.417	.478	.895
12	Dodgers	9	1	5/21/1934	BKN	vs	CHC	L 9-10	0	1.000	36	8	2	1	3	9	7	0	8	1	0	43	21	6	0	0	.222	.349	.583	.932
13	Dodgers	9	1	5/9/1934	BKN	@	CHC	L 9-10	0	1.000	40	15	3	0	4	9	3	0	9	0	0	43	30	7	0	1	.375	.419	.750	1.169
14	Dodgers	9	1	5/1/1934	BKN	@	NYG	L 9-10	0	1.000	40	15	0	0	1	8	2	0	4	0	0	43	18	1	1	1	.375	.405	.450	.855
15	Pirates	8	1	8/25/1934	PIT	vs	PHN	L 8-12	0	1.000	41	15	3	0	1	8	5	0	2	1	0	47	21	4	1	0	.366	.435	.512	.947
16	Phillies	8	1	7/18/1934	PHN	vs	CIN	L 8-9	0	1.000	44	18	3	0	1	8	4	0	4	0	0	48	24	4	0	1	.409	.458	.545	1.004
17	Braves	8	1	7/7/1934	BSN	@	PHN	L 8-9	0	1.000	39	13	0	0	2	8	3	0	3	0	0	42	19	2	0	0	.333	.381	.487	.868
18	Cardinals	8	1	6/19/1934	SLN	vs	PHN	L 8-10	0	1.000	46	14	3	0	2	7	3	0	4	0	0	49	23	5	0	1	.304	.347	.500	.847
19	Dodgers	8	1	6/10/1934	BKN	vs	BSN	L 8-10	0	1.000	42	13	4	0	0	8	10	0	2	0	0	52	17	4	0	3	.310	.442	.405	.847
20	Dodgers	8	1	5/10/1934	BKN	@	CHC	L 8-12	0	1.000	43	16	3	0	3	8	3	0	5	0	0	46	28	6	0	0	.372	.413	.651	1.064
21	Dodgers	8	1	4/28/1934	BKN	@	PHN	L 8-10	0	1.000	35	8	1	0	2	8	5	2	4	2	0	42	15	3	0	0	.229	.357	.429	.786
22	Reds	7	1	9/23/1934	CIN	vs	SLN	L 7-9	0	1.000	37	11	1	0	0	5	0	1	0	0	0	39	12	1	1	1	.297	.316	.324	.640
23	Cubs	7	1	9/22/1934	CHC	@	PIT	L 7-11	0	1.000	41	16	2	2	0	7	1	0	5	0	0	43	22	4	1	0	.390	.405	.537	.941
24	Cubs	7	1	9/20/1934	CHC	@	PHN	L 7-9	0	1.000	40	14	0	0	1	6	6	0	5	1	0	46	17	1	0	0	.350	.435	.425	.860
25	Reds	7	1	9/12/1934	CIN	@	BKN	L 7-8	0	1.000	39	12	1	0	2	7	4	0	2	0	0	44	19	3	1	2	.308	.372	.487	.859