Jack O'Connor

Jack William O'Connor

Position: Pitcher
Bats: Left, Throws: Left
Height: 6' 3", Weight: 215 lb.

Born: June 2, 1958 in Twentynine Palms, CA
High School: Yucca Valley HS (Yucca Valley, CA)
Drafted by the Montreal Expos in the 9th round of the 1976 amateur draft. (All Transactions)
Debut: April 9, 1981
Teams (by GP): Twins/Orioles/Expos 1981-1987

Final Game: October 3, 1987
About biographical information

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Standard Pitching

Year	Age	Tm	Lg	W	L	W-L%	ERA	G	GS	GF	CG	SHO	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	ERA+	WHIP	H/9	HR/9	BB/9	SO/9	SO/BB	Awards
1976	18	WSN-min	Rk	2	3	.400	6.43	5	4					21.0	22	16	15	0	20								2.000	9.4	0.0	8.6			LTH · PION
1977	19	WSN-min	A-	6	6	.500	3.51	13	12		6	0	0	77.0	72	36	30	12	30	2	56	1	1	0			1.325	8.4	1.4	3.5	6.5	1.87	JAM · NYPL
1978	20	WSN-min	A	4	6	.400	4.03	29	11		2	0	1	76.0	78	42	34	3	46	0	53	4	0	4			1.632	9.2	0.4	5.4	6.3	1.15	WPB · FLOR
1979	21	WSN-min	A	9	7	.563	2.84	24	22					146.0	125	60	46	8	63								1.288	7.7	0.5	3.9			WPB · FLOR
1980	22	WSN-min	A,AA,AAA	10	8	.556	3.28	26	25		5	0	0	173.0	138	74	63	10	96	3	117	1	1	6			1.353	7.2	0.5	5.0	6.1	1.22	WPB,MEM,DEN · FLOR,SOUL,AA
1981	23	MIN	AL	3	2	.600	5.86	28	0	11	0	0	0	35.1	46	27	23	3	30	6	16	2	0	0	173	68	2.151	11.7	0.8	7.6	4.1	0.53
1982	24	MIN-min	AAA	3	3	.500	3.40	12	6	2	1	0	1	42.1	42	22	16	4	17	1	42	0	0	0			1.394	8.9	0.9	3.6	8.9	2.47	TOL · IL
1982	24	MIN	AL	8	9	.471	4.29	23	19	3	6	1	0	126.0	122	63	60	13	57	4	56	2	1	3	543	99	1.421	8.7	0.9	4.1	4.0	0.98
1983	25	MIN-min	AAA	2	1	.667	4.98	15	6	6	0	0	4	43.1	52	30	24	7	23	1	39	0	0	3			1.731	10.8	1.5	4.8	8.1	1.70	TOL · IL
1983	25	MIN	AL	2	3	.400	5.86	27	8	9	0	0	0	83.0	107	59	54	13	36	1	56	0	0	3	383	73	1.723	11.6	1.4	3.9	6.1	1.56
1984	26	MIN-min	AAA	9	5	.643	2.04	48	0	32	0	0	14	92.2	62	28	21	7	41	2	96	0	0	4			1.112	6.0	0.7	4.0	9.3	2.34	TOL · IL
1984	26	MIN	AL	0	0		1.93	2	0	0	0	0	0	4.2	1	1	1	1	4	0	0	0	0	0	19	235	1.071	1.9	1.9	7.7	0.0	0.00
1985	27	WSN-min	AAA	3	4	.429	4.72	42	0	23	0	0	4	68.2	62	39	36	9	28	5	63	0	0	2			1.311	8.1	1.2	3.7	8.3	2.25	INA · AA
1985	27	MON	NL	0	2	.000	4.94	20	1	7	0	0	0	23.2	21	14	13	1	13	7	16	0	1	1	106	70	1.437	8.0	0.4	4.9	6.1	1.23

1986	28	SEA-min	AAA	1	6	.143	8.82	23	2	15	0	0	7	32.2	47	33	32	5	17	2	30	0	1	1			1.959	12.9	1.4	4.7	8.3	1.76	CGY · PCL
1987	29	BAL-min	AAA	3	0	1.000	2.67	25	0	8	0	0	3	33.2	28	11	10	2	9	1	19	0	0	1			1.099	7.5	0.5	2.4	5.1	2.11	ROC · IL
1987	29	BAL	AL	1	1	.500	4.30	29	0	7	0	0	2	46.0	46	23	22	5	23	4	33	0	0	3	202	103	1.500	9.0	1.0	4.5	6.5	1.43
1988	30	TOR-min	AAA	2	6	.250	4.11	40	3	18	0	0	4	81.0	86	42	37	5	28	2	63	1	0	5			1.407	9.6	0.6	3.1	7.0	2.25	SYR · IL
1989	31	TOR-min	AAA	1	2	.333	2.84	18	1	4	0	0	0	25.1	21	8	8	1	11	0	13	0	0	2			1.263	7.5	0.4	3.9	4.6	1.18	SYR · IL
6 Yrs				14	17	.452	4.89	129	28	37	6	1	2	318.2	343	187	173	36	163	22	177	4	2	10	1426	86	1.588	9.7	1.0	4.6	5.0	1.09
162 Game Avg.				6	7	.452	4.89	56	12	16	3	0	1	138	149	81	75	16	71	10	77	2	1	4	618	86	1.588	9.7	1.0	4.6	5.0	1.09

MIN (4 yrs)				13	14	.481	4.99	80	27	23	6	1	0	249.0	276	150	138	30	127	11	128	4	1	6	1118	85	1.618	10.0	1.1	4.6	4.6	1.01
MON (1 yr)				0	2	.000	4.94	20	1	7	0	0	0	23.2	21	14	13	1	13	7	16	0	1	1	106	70	1.437	8.0	0.4	4.9	6.1	1.23
BAL (1 yr)				1	1	.500	4.30	29	0	7	0	0	2	46.0	46	23	22	5	23	4	33	0	0	3	202	103	1.500	9.0	1.0	4.5	6.5	1.43

AL (5 yrs)				14	15	.483	4.88	109	27	30	6	1	2	295.0	322	173	160	35	150	15	161	4	1	9	1320	87	1.600	9.8	1.1	4.6	4.9	1.07
NL (1 yr)				0	2	.000	4.94	20	1	7	0	0	0	23.2	21	14	13	1	13	7	16	0	1	1	106	70	1.437	8.0	0.4	4.9	6.1	1.23

Player Value--Pitchers

WAR Explained (v2.1): 8+ MVP, 5+ A-S, 2+ Starter, 0-2 Sub, < 0 Repl

Year	Age	Tm	Lg	IP	G	GS	R	RA9	RA9opp	RA9def	RA9role	PPFp	RA9avg	RAA	WAA	gmLI	WAAadj	WAR	RAR	waaWL%	162WL%	Salary
1981	23	MIN	AL	35.1	28	0	27	6.88	4.00	-0.19	-0.32	110.5	4.27	-10	-1.1	1.3	-0.2	-1.0	-8	.461	.493	$
1982	24	MIN	AL	126.0	23	19	63	4.50	4.46	0.36	0.11	104.4	4.40	-1	-0.1	.4	-0.1	0.9	12	.497	.500	$
1983	25	MIN	AL	83.0	27	8	59	6.40	4.60	0.09	-0.11	103.6	4.57	-17	-1.7	.7	0.1	-0.9	-8	.438	.490	$
1984	26	MIN	AL	4.2	2	0	1	1.93	3.96	0.61	-0.32	110.0	3.34	1	0.1	.2	-0.0	0.1	1	.540	.500	$
1985	27	MON	NL	23.2	20	1	14	5.32	4.14	0.05	-0.29	94.6	3.60	-5	-0.5	.9	-0.0	-0.3	-2	.474	.497	$

1987	29	BAL	AL	46.0	29	0	23	4.50	5.05	-0.05	-0.39	97.4	4.59	0	0.0	1.2	-0.1	0.4	6	.502	.500	$85,000
6 Seasons				318.2	129	28	187	5.28	4.50	0.15	-0.10	103.2	4.38	-31	-3.2	1.0	-0.3	-0.8	0	.475	.497	$85,000

MIN (4 yrs)				249.0	80	27	150	5.42	4.43	0.19	-0.03	105.1	4.42	-27	-2.8	.9	-0.3	-0.9	-3	.465	.496	$
MON (1 yr)				23.2	20	1	14	5.32	4.14	0.05	-0.29	94.6	3.60	-5	-0.5	.9	-0.0	-0.3	-2	.474	.497	$
BAL (1 yr)				46.0	29	0	23	4.50	5.05	-0.05	-0.39	97.4	4.59	0	0.0	1.2	-0.1	0.4	6	.502	.500	$85,000

Batting Against -- Pitching*

Year	Age	Tm	Lg	G	PA	AB	R	H	2B	3B	HR	SB	CS	BB	SO	BA	OBP	SLG	OPS	BAbip	TB	GDP	HBP	SH	SF	IBB	ROE
1981	23	MIN	AL	28	173	137	27	46	6	1	3	5	2	30	16	.336	.462	.460	.921	.364	63	8	2	4	0	6	3
1982	24	MIN	AL	23	543	478	63	122	22	1	13	9	3	57	56	.255	.336	.387	.723	.265	185	14	2	4	2	4	2
1983	25	MIN	AL	27	383	340	59	107	22	3	13	11	6	36	56	.315	.376	.512	.888	.342	174	5	0	3	4	1	6
1984	26	MIN	AL	2	19	15	1	1	0	0	1	0	0	4	0	.067	.263	.267	.530	.000	4	0	0	0	0	0	0
1985	27	MON	NL	20	106	88	14	21	8	0	1	2	0	13	16	.239	.330	.364	.694	.274	32	3	0	3	2	7	3

1987	29	BAL	AL	29	202	175	23	46	12	0	5	4	0	23	33	.263	.343	.417	.760	.293	73	6	0	1	3	4	2
6 Yrs				129	1426	1233	187	343	70	5	36	31	11	163	177	.278	.361	.431	.792	.298	531	36	4	15	11	22	16
162 Game Avg.				56	618	534	81	149	30	2	16	13	5	71	77	.278	.361	.431	.792	.298	230	16	2	6	5	10	7
MLB Averages																.260	.325	.392	.716	.284

Win Probability

Year	Age	Tm	Lg	PtchR	PitchW	Plays	WPA	WPA+	WPA-	aLI	WPA/LI	Clutch	RE24	REW	boLI	RE24/boLI	LevHi	LevMd	LevLo
1981	23	MIN	AL	-7.3	-0.8	182	-0.5	2.9	-3.5	1.11	-0.8	0.3	-10.9	-1.1	1.11	-11.9	9	5	14
1982	24	MIN	AL	1.0	0.1	558	0.9	9.9	-9.0	.99	0.6	0.3	6.2	0.6	0.99	6.7	0	1	2
1983	25	MIN	AL	-13.3	-1.3	402	-0.7	4.4	-5.1	.69	-1.6	0.6	-17.3	-1.6	0.69	-17.5	3	3	12
1984	26	MIN	AL	1.3	0.1	19	-0.0	0.0	-0.0	.10	0.1	-0.1	1.0	0.1	0.10	0.9	0	0	2
1985	27	MON	NL	-3.7	-0.4	110	-0.3	1.4	-1.8	.86	-0.2	-0.2	-4.5	-0.5	0.86	-3.8	5	2	11

1987	29	BAL	AL	1.2	0.1	209	0.1	2.7	-2.6	.80	0.1	0.1	-5.8	-0.6	0.80	-0.6	10	7	11
6 Yrs				-20.8	-2.1	1480	-0.5	21.5	-22.0	.88	-1.8	1.2	-31.4	-3.0	0.88	-26.2	27	18	52

Starting Pitching*

Year	Age	Tm	Lg	G	GS	Wgs	Lgs	ND	Wchp	Ltuf	Wtm	Ltm	tmW-L%	Wlst	Lsv	CG	SHO	QS	QS%	GmScA	Best	Wrst	BQR	BQS	sDR	lDR	RS/GS	RS/IP	IP/GS
1982	24	MIN	AL	23	19	8	9	2	2	2	8	11	.421	2	0	6	1	9	47%	48.2	78	10	22	10	0	10	4.3	5.0	6.1
1983	25	MIN	AL	27	8	1	3	4	0	0	3	5	.375	3	1	0	0	2	25%	39.0	65	16	28	13	0	7	5.1	5.0	5.2

1985	27	MON	NL	20	1	0	1	0	0	0	0	1	.000	0	0	0	0	0	0%	3.0	3	3	9	1	0	1	2.0	0.0	1.7
3 Yrs				70	28	9	13	6	2	2	11	17	.393	5	1	6	1	11	39%	44	78	3	59	24	0	18	4.5	5.0	5.7
MLB Averages													.500						51%	50	98	-12					4.4	4.3	6.2

Reliever Pitching*

Year	Age	Tm	Lg	G	GR	GF	Wgr	Lgr	SVOpp	SV	BSv	SV%	SVSit	Hold	IR	IS	IS%	1^stIP	aLI	LevHi	LevMd	LevLo	Ahd	Tie	Bhd	Runr	Empt	>3o	<3o	IPmult	0DR	Out/GR
1981	23	MIN	AL	28	28	11	3	2	3	0	3	0%	4	1	44	11	25%	8	1.113	9	5	14	4	4	20	24	4	13	11	19	4	3.8
1982	24	MIN	AL	23	4	3	0	0	0	0	0		0	0	3	1	33%	9	.989	0	1	2	0	1	3	2	2	1	1	1	0	7.0
1983	25	MIN	AL	27	19	9	1	0	0	0	0		0	0	23	12	52%	8	.692	3	3	12	2	1	16	11	8	13	2	15	1	6.6
1984	26	MIN	AL	2	2	0	0	0	0	0	0		0	0	2	1	50%	6	.103	0	0	2	0	0	2	1	1	2	0	2	0	7.0
1985	27	MON	NL	20	19	7	0	1	1	0	1	0%	3	1	11	2	18%	7	.858	5	2	11	4	3	12	7	12	7	5	7	6	3.5

1987	29	BAL	AL	29	29	7	1	1	3	2	1	67%	7	4	37	18	49%	8	.802	10	7	11	8	2	19	25	4	16	9	22	6	4.8
6 Yrs				129	101	37	5	4	7	2	5	29%	14	6	120	45	38%		.876	27	18	52	18	11	72	70	31	52	28	66	17	4.7

Ratio Pitching*

Year	Age	Tm	Lg	PA	Ptn%	HR%	SO%	BB%	XBH%	X/H%	GO/AO	IP%	DPopp	DPs	DP%
1981	23	MIN	AL	173	38%	1.7%	9.3%	17.3%	5.8%	22%	1.63	68%	47	8	17%
1982	24	MIN	AL	543	18%	2.4%	10.3%	10.5%	6.6%	30%	0.72	76%	107	14	13%
1983	25	MIN	AL	383	23%	3.4%	14.6%	9.4%	9.9%	36%	0.71	72%	83	5	6%
1984	26	MIN	AL	19	21%	5.3%	0.0%	21.1%	5.3%	100%	0.56	74%	3	0	0%
1985	27	MON	NL	106	33%	0.9%	15.1%	12.3%	8.5%	43%	0.77	69%	15	3	20%

1987	29	BAL	AL	202	28%	2.5%	16.3%	11.4%	8.4%	37%	0.94	69%	41	6	15%
6 Yrs				1426	24%	2.5%	12.4%	11.4%	7.8%	32%	0.82	72%	296	36	12%
MLB Averages					41%	2.2%	14.1%	8.5%	6.8%	29%	1.08	74%			11%

Baserunning & Situational Stats*

					Hits			Home Runs							Advances				Baserunning
Year	Age	Tm	Lg	PA	H	Inf	Bnt	All	GS	GSo	vRH	vLH	Hm	Rd	<2,3B	Scr	SO	%	ROE	WP	PB	SBO	SB	CS	SB%	SB2	CS2	SB3	CS3	SBH	CSH	PO	PCS	BT	PAu
1981	23	MIN	AL	173	46			3	0	12	3	0	3	0	10	7	1	70%	3	0	0	89	5	2	71%	3	1	2	1	0	0	3	0	0	0
1982	24	MIN	AL	543	122			13	0	9	11	2	5	8	18	7	2	39%	2	3	0	209	9	3	75%	8	3	1	0	0	0	3	2	6	0
1983	25	MIN	AL	383	107			13	0	9	9	4	10	3	18	10	1	56%	6	3	1	157	11	6	65%	6	5	5	1	0	0	1	1	10	0
1984	26	MIN	AL	19	1			1	0	2	1	0	1	0	0	0	0		0	0	0	6	0	0		0	0	0	0	0	0	0	0	0	0
1985	27	MON	NL	106	21			1	0	2	1	0	0	1	6	5	0	83%	3	1	0	46	2	0	100%	2	0	0	0	0	0	0	0	7	0

1987	29	BAL	AL	202	46			5	1	8	2	3	2	3	17	8	2	47%	2	3	0	88	4	0	100%	4	0	0	0	0	0	0	0	9	0
6 Yrs				1426	343			36	1	42	27	9	21	15	69	37	6	54%	16	10	1	595	31	11	74%	23	9	8	2	0	0	7	3	32	0
MLB Averages																		53%							67%

Cumulative Pitching

Year	Age	W	L	W-L%	ERA	G	GS	GF	CG	SHO	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	ERA+	WHIP	H/9	HR/9	BB/9	SO/9	SO/BB	ERA+
1981	23	3	2	.600	5.86	28	0	11	0	0	0	35.1	46	27	23	3	30	6	16	2	0	0	173	68	2.151	11.7	0.8	7.6	4.1	0.53	68
1982	24	11	11	.500	4.63	51	19	14	6	1	0	161.1	168	90	83	16	87	10	72	4	1	3	716	91	1.581	9.4	0.9	4.9	4.0	0.83	91
1983	25	13	14	.481	5.05	78	27	23	6	1	0	244.1	275	149	137	29	123	11	128	4	1	6	1099	84	1.629	10.1	1.1	4.5	4.7	1.04	84
1984	26	13	14	.481	4.99	80	27	23	6	1	0	249.0	276	150	138	30	127	11	128	4	1	6	1118	85	1.618	10.0	1.1	4.6	4.6	1.01	85
1985	27	13	16	.448	4.98	100	28	30	6	1	0	272.2	297	164	151	31	140	18	144	4	2	7	1224	83	1.603	9.8	1.0	4.6	4.8	1.03	83
1986	28	13	16	.448	4.98	100	28	30	6	1	0	272.2	297	164	151	31	140	18	144	4	2	7	1224	83	1.603	9.8	1.0	4.6	4.8	1.03	83
1987	29	14	17	.452	4.89	129	28	37	6	1	2	318.2	343	187	173	36	163	22	177	4	2	10	1426	86	1.588	9.7	1.0	4.6	5.0	1.09	86

Neutralized Pitching

Change to: / / / or

All seasons are converted to 162-game seasons &
average team scoring of 716 total runs (4.42 R/G) How this works

Year	Age	W	L	W-L%	ERA	IP	H	R	ER	HR	BB	SO	HBP	WHIP	H/9	BB/9	SO/9	SO/BB	HR/9	Gact
1981	23	1	4	.200	7.28	47.0	72	42	38	5	47	21	3	2.532	13.8	9.0	4.0	0.45	1.0	28
1982	24	6	7	.462	4.58	120.0	123	68	61	13	57	53	2	1.500	9.2	4.3	4.0	0.93	1.0	23
1983	25	2	6	.250	6.19	80.0	108	61	55	13	36	54	0	1.800	12.2	4.1	6.1	1.50	1.5	27
1984	26	0	0		1.80	5.0	1	1	1	1	4	0	0	1.000	1.8	7.2	0.0	0.00	1.8	2
1985	27	1	1	.500	5.87	23.0	23	17	15	1	14	16	0	1.609	9.0	5.5	6.3	1.14	0.4	20

1987	29	2	2	.500	4.50	44.0	46	24	22	5	23	32	0	1.568	9.4	4.7	6.5	1.39	1.0	29
6 Yrs		12	20	.375	5.42	319.0	373	213	192	38	181	176	5	1.737	10.5		5.0	0.97	1.1	129

* Many Detailed Statistics are based on play-by-play accounts accumulated by RetroSheet. These totals may be incomplete (3.6% of all plays from 1918 to 1973 are missing or have incomplete accounts, click link for year and team summary) for some players prior to 1974 and even complete seasons may not match the official totals due to errors in both the official totals and the play-by-play accounts. Pre-1954 seasons have a substantial numbers of games missing play-by-play accounts and should be viewed as essentially incomplete.

Similarity Scores

Explanation of Similarity Scores

Similar Pitchers

Compare Stats to Similars

Most Similar by Ages

Hold mouse over #'s to see names

Ken Heintzelman (985) 2 3 4 5 6 7 8 9 10 C
Wil Ledezma (983) 2 3 4 5 6 7 8 9 10 C
Clyde Shoun (983) 2 3 4 5 6 7 8 9 10 C
Dick Littlefield (985) 2 3 4 5 6 7 8 9 10 C
Bill Kennedy (983) 2 3 4 5 6 7 8 9 10 C

Other Resources & Links

Error? Compare Search SABR's Baseball Index Other Links@google.com Baseball Library Baseball-Almanac.com Retrosheet The Baseball Page WhatIfSports: Jack O'Connor

Viewed 3,684 times through June 1, 2012.
Name and misspellings: Jack jach Jack jakie joe William O'Connor oconnor

Player Page Tricks and Tips

Sum any set of rows by clicking anywhere (not red or blue) on the first and last rows of your selection. We will then compute the totals for the player between and including those two seasons.
Default Setting for this feature: Turn On / Turn Off
Summation of season totals only works for the initial case when the table is in year order. On a sorted table the results may get a bit goofy.

HIGHLIGHTING: Adding a range or series of player's career seasons or career game numbers (like '#1972:batting_standard', '#1970-1980-sum:batting_standard', or '#1998,1999,2001,2002,sum:pitching_standard') onto the end of a player page url causes the seasons to the highlighted and summed. After changing address bar, reload the page to see highlighting. This will work even in links e-mailed to others. Note that for tables with multiple pages the first table is the default. If you want to create a sum for a table other than the first one, select the rows and after the summation window appears click on "permanent link" link.

The play-by-play information both shown and used to create certain data sets was obtained free of charge from and is copyrighted by RetroSheet.