Fred Gladding has the lowest career OPS when making >50 plate appearances, with an OPS of .031.

Interpreted as:

lowest ops by a player with >50 pa MLB history

	NAME	OPS	PA	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	WRC	WRAA	WOBA	WRC+	BRAA
1	Fred Gladding F. Gladding	.031	68	421	63	1	1	0	0	0	3	0	0	40	0	0	1	0	4	1	0	1	.016	.016	.016	-8	-14.8	.014	-101	-15.4
2	Rick Van Den Hurk R. Van Den Hurk	.063	54	32	47	1	1	0	0	0	0	1	0	31	0	0	1	0	6	0	0	0	.021	.042	.021	-7	-13.3	.033	-99	-13.6
3	Ivan Nova I. Nova	.081	166	79	149	2	6	0	0	0	0	0	0	96	0	0	6	0	17	0	0	1	.040	.040	.040	-19	-38.7	.035	-91	-39.4
4	Aaron Heilman A. Heilman	.083	54	306	47	1	1	0	0	0	1	2	0	24	0	0	1	0	5	0	0	0	.021	.061	.021	-6	-12.8	.047	-88	-12.9
5	Jim Duckworth J. Duckworth	.099	65	97	59	1	2	0	0	0	1	1	1	39	0	0	2	0	4	0	0	0	.034	.066	.034	-5	-12.3	.052	-75	-13
6	Ron Herbel R. Herbel	.104	225	318	206	6	6	2	0	0	3	8	0	125	0	1	8	2	11	0	0	2	.029	.065	.039	-18	-42.1	.055	-71	-44
7	Mike Bolsinger M. Bolsinger	.106	69	36	66	2	3	1	0	0	1	0	0	37	0	0	4	1	3	0	0	0	.045	.045	.061	-7	-14.6	.046	-84	-14.8
8	Andrew Miller A. Miller	.108	78	176	74	1	4	0	0	0	3	0	0	38	0	0	4	0	4	0	0	0	.054	.054	.054	-8	-17.8	.048	-89	-18.2
9	Drew Smyly D. Smyly	.108	67	44	64	1	3	0	0	0	0	1	0	29	0	0	3	0	2	0	0	0	.047	.062	.047	-7	-14.8	.051	-79	-15.3
10	Erick Fedde E. Fedde	.110	85	61	71	2	3	0	0	0	1	2	0	28	0	0	3	0	11	1	0	1	.042	.068	.042	-8	-18.5	.054	-76	-19.1
11	Elieser Hernández E. Hernández	.112	53	63	44	1	2	0	0	0	0	1	0	24	0	0	2	0	8	0	0	0	.045	.067	.045	-5	-11.6	.054	-72	-11.7
12	Vicente Palacios V. Palacios	.112	101	127	88	2	4	0	0	0	0	2	0	43	0	0	4	0	11	0	0	1	.045	.067	.045	-10	-21.9	.056	-80	-21.9
13	Mike Thurman M. Thurman	.117	155	89	131	6	4	0	0	0	0	7	1	93	0	0	4	0	16	0	0	0	.031	.086	.031	-15	-35.1	.067	-76	-36.2
14	Chad Gaudin C. Gaudin	.118	74	93	65	1	2	0	0	0	1	4	0	34	0	0	2	0	5	0	0	0	.031	.087	.031	-7	-15.2	.066	-69	-14.8
15	Justin Nicolino J. Nicolino	.120	64	50	58	0	3	0	0	0	0	1	0	21	0	0	3	0	5	0	0	1	.052	.068	.052	-6	-13.7	.056	-77	-13.7
16	Charlie McCullough C. McCullough	.121	101	29	95	3	3	0	0	0	1	6	0		3		3	0					.032	.089	.032	-6	-21.8	.075	-42	-21.7
17	Sean Newcomb S. Newcomb	.121	98	128	81	4	3	1	0	0	1	3	0	57	0	0	4	1	14	0	0	1	.037	.071	.049	-9	-20.9	.060	-76	-21.7
18	Roberto Hernandez R. Hernandez	.122	85	44	73	2	4	0	0	0	2	1	0	40	0	0	4	0	11	0	0	0	.055	.068	.055	-8	-17	.057	-76	-17.2
19	Don Carman D. Carman	.124	239	339	209	3	12	0	0	0	5	2	0	75	0	1	12	0	28	0	0	5	.057	.066	.057	-21	-48.8	.058	-81	-49.7
20	Yusmeiro Petit Y. Petit	.124	129	205	119	6	6	0	0	0	3	3	0	49	0	0	6	0	7	0	0	3	.050	.074	.050	-12	-27.3	.061	-79	-27.9
21	Ray Fontenot R. Fontenot	.125	52	81	48	3	3	0	0	0	0	0	0	24	0	0	3	0	4	0	0	1	.063	.063	.063	-5	-10.7	.056	-87	-11.1
22	Eddie Butler E. Butler	.129	71	58	61	0	3	0	0	0	0	2	0	24	0	0	3	0	8	0	0	0	.049	.079	.049	-6	-14.5	.064	-85	-15.8
23	Don Kaiser D. Kaiser	.129	71	58	68	2	4	0	0	0	2	1	0	38	0	0	4	0	0	2	0	0	.059	.070	.059	-7	-14.7	.061	-78	-15.2
24	Williams Perez W. Perez	.130	53	32	45	2	2	0	0	0	0	2	0	18	0	0	2	0	6	0	0	1	.044	.085	.044	-5	-10.7	.067	-71	-10.8
25	Chuck Finley C. Finley	.132	59	24	53	3	3	1	0	0	1	0	0	26	0	0	4	1	6	0	0	1	.057	.057	.075	-6	-13.3	.057	-79	-13.5