Jack Morris played 14 seasons with a win percentage of .500 or better.

Interpreted as:

Jack Morris seasons with 500 or higher w%

	NAME	SEAS	W%	SEASON	TM	W	L	G	GS	ERA	SO	CG	SHO	IP	H	ER	R	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Jack Morris J. Morris	1	.500	1977	DET	1	1	7	6	3.74	28	1	0	45.2	38	19	20	4	23	0	0	189	2	5.52	4.53	1.22	0.79	14.8	12.2	1.34	.254	3.94	90	4.15	99	7.49	0.2
2	Jack Morris J. Morris	1	.708	1979	DET	17	7	27	27	3.28	113	9	1	197.2	179	72	76	19	59	4	4	806	9	5.15	2.69	1.92	0.87	14.0	7.3	1.20	.262	3.46	75	3.78	87	8.15	12.4
3	Jack Morris J. Morris	1	.516	1980	DET	16	15	36	36	4.18	112	11	2	250.0	252	116	125	20	87	4	5	1,074	6	4.03	3.13	1.29	0.72	10.4	8.1	1.36	.273	4.50	102	3.98	94	9.07	7.2
4	Jack Morris J. Morris	1	.667	1981	DET	14	7	25	25	3.05	97	15	1	198.0	153	67	69	14	78	2	11	798	2	4.41	3.55	1.24	0.64	12.2	9.8	1.17	.229	3.14	83	3.75	98	6.95	2
5	Jack Morris J. Morris	1	.515	1982	DET	17	16	37	37	4.06	135	17	3	266.1	247	120	131	37	96	0	7	1,107	10	4.56	3.24	1.41	1.25	12.2	8.7	1.29	.250	4.43	101	4.58	110	8.35	-11.3
6	Jack Morris J. Morris	1	.606	1983	DET	20	13	37	37	3.34	232	20	1	293.2	257	109	117	30	83	3	5	1,204	18	7.11	2.54	2.80	0.92	19.3	6.9	1.16	.265	3.59	83	3.37	82	7.88	24
7	Jack Morris J. Morris	1	.633	1984	DET	19	11	35	35	3.60	148	9	1	240.1	221	96	108	20	87	2	7	1,015	14	5.54	3.26	1.70	0.75	14.6	8.6	1.28	.265	4.04	92	3.72	91	8.28	9.9
8	Jack Morris J. Morris	1	.593	1985	DET	16	11	35	35	3.33	191	13	4	257.0	212	95	102	21	110	5	7	1,077	15	6.69	3.85	1.74	0.74	17.7	10.2	1.25	.255	3.57	83	3.60	87	7.42	15.1
9	Jack Morris J. Morris	1	.724	1986	DET	21	8	35	35	3.27	223	15	6	267.0	229	97	105	40	82	0	7	1,092	12	7.52	2.76	2.72	1.35	20.4	7.5	1.16	.253	3.54	81	3.96	94	7.72	7.1
10	Jack Morris J. Morris	1	.621	1987	DET	18	11	34	34	3.38	208	13	0	266.0	227	100	111	39	93	1	7	1,101	24	7.04	3.15	2.24	1.32	18.9	8.4	1.20	.247	3.76	77	4.26	94	7.68	8.5
11	Jack Morris J. Morris	1	.536	1988	DET	15	13	34	34	3.94	168	10	2	235.0	225	103	115	20	83	4	7	997	11	6.43	3.18	2.02	0.77	16.9	8.3	1.31	.284	4.40	103	3.55	90	8.62	10.6
12	Jack Morris J. Morris	1	.600	1991	MIN	18	12	35	35	3.43	163	10	2	246.2	226	94	107	18	92	5	5	1,032	15	5.95	3.36	1.77	0.66	15.8	8.9	1.29	.276	3.90	81	3.66	91	8.25	9.4
13	Jack Morris J. Morris	1	.778	1992	TOR	21	6	34	34	4.04	132	6	1	240.2	222	108	114	18	80	10	2	1,005	9	4.94	2.99	1.65	0.67	13.1	8.0	1.25	.267	4.26	101	3.77	94	8.30	6.5
14	Jack Morris J. Morris	1	.625	1994	CLE	10	6	23	23	5.60	100	1	0	141.1	163	88	96	14	67	4	2	636	13	6.37	4.27	1.49	0.89	15.7	10.5	1.63	.330	6.11	116	4.50	96	10.38	2.8
	Total	14	.619			223	137	434	433	3.67	2,050	150	24	3145.1	2,851	1,284	1,396	314	1,120	44	76	13,133	160	5.87	3.20	1.83	0.90	15.6	8.5	1.26	.264	3.99	90	3.87	93	8.16	104.7