Irv Young has the highest career average Game Score, with 89 per game.

Interpreted as:

highest career average game score by a player

	NAME	GSC	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Irv Young I. Young	89	83	17	26	.395	46	0.07	170	20	7	2	404.0	390		193	5	104	10	21		1,641	5	3.79	2.32	1.63	0.11	10.4	6.3	1.22	.285	4.30	8.69
2	Don Fisher D. Fisher	86	2	1	0	1.000	1	2.00	4	1	1	0	18.0	12	4	4	1	7	2	1		74	0	2.00	3.50	0.57	0.50	5.4	9.5	1.06	.183	2.00	6.00
3	Luis Aloma L. Aloma	79	116	18	3	.857	1	3.45	116	1	1	15	235.0	212	90	98	21	111	4	55		1,003	6	4.44	4.25	1.05	0.80	11.6	11.1	1.37	.254	3.75	8.12
4	Tex Covington T. Covington	79	31	10	5	.667	15	0.00	49	7	1	0	147.0	153		76	2	64	13	7		632	7	3.00	3.92	0.77	0.12	7.8	10.1	1.48	.300	4.65	9.37
5	Darrin Winston D. Winston	78	34	4	2	.667	1	5.84	19	0	0	1	37.0	39	24	26	11	9	4	6	1	164	1	4.62	2.19	2.11	2.68	11.6	5.5	1.30	.231	6.32	9.49
6	Larry Anderson L. Anderson	78	16	2	3	.400	1	5.66	23	1	1	0	41.1	48	26	28	4	22	0	8	4	191	11	5.01	4.79	1.05	0.87	12.0	11.5	1.69	.310	6.10	10.45
7	Dave Jolly D. Jolly	77	159	16	14	.533	1	3.78	157	0	0	19	290.2	254	122	137	27	198	7	82	11	1,313	11	4.86	6.13	0.79	0.84	12.0	15.1	1.56	.246	4.24	7.86
8	Prince Oana P. Oana	77	13	3	2	.600	1	3.77	18	0	0	1	45.1	37	19	23	4	26	2	8		196	0	3.57	5.16	0.69	0.79	9.2	13.3	1.39	.226	4.57	7.35
9	Eddie O'Brien E. O'Brien	76	5	1	0	1.000	1	3.31	11	1	0	0	16.1	16	6	6	3	4	1	2		68	0	6.06	2.20	2.75	1.65	16.2	5.9	1.22	.265	3.31	8.82
10	Len Perme L. Perme	75	8	0	1	.000	1	3.12	6	1	0	0	17.1	11	6	6	0	11	1	5		74	0	3.12	5.71	0.55	0.00	8.1	14.9	1.27	.196	3.12	5.71
11	Pat Bohen P. Bohen	75	2	0	1	.000	1	3.00	5	1	0	0	9.0	5	3	3	0	4	1	1		35	1	5.00	4.00	1.25	0.00	14.3	11.4	1.00	.200	3.00	5.00
12	Big Jeff Pfeffer B. Jeff Pfeffer	74	43	8	5	.615	7	0.18	38	5	1	2	147.2	177		121	5	84	2	30			2	2.32	5.12	0.45	0.30		12.6	1.77	.320	7.37	10.79
13	Cy Young C. Young	74	110	54	45	.545	105	0.01	383	86	9	2	882.0	782		315	11	147	18	4		3,465	23	3.91	1.50	2.61	0.11	11.1	4.2	1.05	.265	3.21	7.98
14	Easton McGee E. McGee	73	4	0	0		1	0.66	7	0	0	0	13.2	8	1	2	0	2	0	2	0	51	0	4.61	1.32	3.50	0.00	13.7	3.9	0.73	.190	1.32	5.27
15	Chris Saenz C. Saenz	72	1	1	0	1.000	1	0.00	7	0	0	0	6.0	2	0	0	0	3	1	0	0	24	0	10.50	4.50	2.33	0.00	29.2	12.5	0.83	.154	0.00	3.00
16	Johnny Tillman J. Tillman	72	2	1	0	1.000	1	0.90	6	0	0	0	10.0	6	1	2	0	4	0	0		40	0	5.40	3.60	1.50	0.00	15.0	10.0	1.00	.200	1.80	5.40
17	Jack Pfiester J. Pfiester	71	82	36	23	.610	72	0.03	246	40	10	0	581.2	499		201	2	163	19	5		2,365	9	3.81	2.52	1.51	0.03	10.4	6.9	1.14	.257	3.11	7.72
18	Tim Jones T. Jones	70	3	1	0	1.000	1	0.00	5	0	0	0	10.0	4	0	0	0	3	0	2	0	37	0	4.50	2.70	1.67	0.00	13.5	8.1	0.70	.138	0.00	3.60
19	Ed Karger E. Karger	69.7	95	26	29	.473	69	0.05	197	35	3	1	566.0	541		276	10	197	16	22			17	3.13	3.13	1.00	0.16		8.3	1.30	.273	4.39	8.60
20	Juan Pena J. Pena	69.5	2	2	0	1.000	2	0.69	15	0	0	0	13.0	9	1	1	0	3	0	0	0	49	0	10.38	2.08	5.00	0.00	30.6	6.1	0.92	.290	0.69	6.23
21	Randy Hennis R. Hennis	69	3	0	0		1	0.00	4	0	0	0	9.2	1	0	0	0	3	1	1	0	34	0	3.72	2.79	1.33	0.00	11.8	8.8	0.41	.038	0.00	0.93
22	Pedro Dibut P. Dibut	69	8	3	0	1.000	2	2.70	15	2	0	0	36.2	27	11	11	1	12	0	5		146	0	3.68	2.95	1.25	0.25	10.3	8.2	1.06	.220	2.70	6.63
23	Tim McCabe T. McCabe	69	22	5	1	.833	4	2.90	26	4	1	0	71.1	60	23	38	2	21	3	7		292	2	3.28	2.65	1.24	0.25	8.9	7.2	1.14	.242	4.79	7.57
24	Dan Tipple D. Tipple	68.5	3	1	1	.500	2	0.95	14	2	0	0	19.0	14	2	6	1	11	0	1		80	2	6.63	5.21	1.27	0.47	17.5	13.8	1.32	.241	2.84	6.63
25	Joe Wood J. Wood	68.2	225	117	57	.672	158	0.75	1,002	121	28	10	1433.1	1,133		497	10	424	52	58			43	6.29	2.66	2.36	0.06		7.4	1.09	.263	3.12	7.11