What years did Jack O'Connor play?

Jack O'Connor played in Major League Baseball from 1981 to 1987.

Was Jack O'Connor a pitcher?

Yes. Jack O'Connor pitched in the major leagues, recording 14 wins and 177 strikeouts.

What was Jack O'Connor's career ERA?

Jack O'Connor finished with a 4.89 career ERA, going 14-17 with 177 strikeouts.

How many strikeouts did Jack O'Connor have?

Jack O'Connor recorded 177 career strikeouts.

Is Jack O'Connor in the Hall of Fame?

No. Jack O'Connor has not been inducted into the National Baseball Hall of Fame.

Jack O'Connor

Pitcher · Career Stats, Bio & Records (1981-1987)

Jack O'Connor was a pitcher who played in Major League Baseball from 1981 to 1987 for the Minnesota Twins, the Montreal Expos, and the Baltimore Orioles, a span of 7 seasons. Across 129 career appearances, he went 14-17 with a 4.89 ERA and 177 strikeouts.

W (Wins):: Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
ERA (Earned Run Average):: Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
SO (Strikeouts):: For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
WHIP (Walks and Hits per Inning Pitched):: Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.

Data updated October 12, 2026

W–L 14–17

ERA 4.89

WHIP 1.59

SO 177

Pitcher PIV -5599.7

Position: Pitcher
Bats / Throws: L / L
Height / Weight: 6'3" / 215 lb
Born: 6/2/1958 in Twenty-Nine Palms, CA, USA
MLB Debut: 1981-04-09
Last Game: 1987-10-03

Full name: Jack William O'Connor

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Career Pitching Statistics

Jack O'Connor — Career Pitching Statistics
W	L	G	GS	CG	SHO	SV	IP	H	ER	HR	BB	SO	ERA	Pitcher PIV
14	17	129	28	6	1	2	318.2	343	173	36	163	177	4.89	-5599.7

Career ERA 4.89 vs. league average 3.90 across their career seasons — 25.2% worse than league average.

Season-by-Season Pitching

Pitching Career Arc

Click a stat to plot it across every season.

Jack O'Connor — Season-by-Season Pitching
Year	Team	Lg	W	L	G	GS	CG	SHO	SV	IP	H	ER	BB	SO	ERA	Lg ERA	Pitcher PIV
1981	MIN	AL	3	2	28	0	0	0	0	35.1	46	23	30	16	5.86	3.58 (-63%)	-1706.5
1982	MIN	AL	8	9	23	19	6	1	0	126.0	122	60	57	56	4.29	3.86 (-11%)	-2239.0
1983	MIN	AL	2	3	27	8	0	0	0	83.0	107	54	36	56	5.86	3.87 (-51%)	-1806.6
1984	MIN	AL	0	0	2	0	0	0	0	4.2	1	1	4	0	1.93	—	0.0
1985	MON	NL	0	2	20	1	0	0	0	23.2	21	13	13	16	4.94	3.89 (-27%)	216.5
1987	BAL	AL	1	1	29	0	0	0	2	46.0	46	22	23	33	4.30	4.29 (avg)	-64.2
Career · 6 seasons			14	17	129	28	6	1	2	318.2	343	173	163	177	4.89	—	-5,600

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Career Batting Statistics

Jack O'Connor — Career Batting Statistics
G	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	OBP	SLG	OPS	PIV
129	0	0	0	0	0	0	0	0	0	0	.000	.000	.000	.000	0

Season-by-Season Batting

Career Arc

Click a stat to plot it across every season.

Jack O'Connor — Season-by-Season Batting
Year	Team	Lg	G	AVG	Lg AVG	Lg OBP	Lg SLG	Lg OPS	PIV
1981	MIN	AL	28	.000	—	—	—	—	0.0
1982	MIN	AL	23	.000	—	—	—	—	0.0
1983	MIN	AL	27	.000	—	—	—	—	0.0
1984	MIN	AL	2	.000	—	—	—	—	0.0
1985	MON	NL	20	.000	—	—	—	—	0.0
1987	BAL	AL	29	.000	—	—	—	—	0.0
Career · 6 seasons			129	—	—	—	—	—	0

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Game Log & Splits

View full game log (258 games) →

Per-game data from Retrosheet (regular season, through 2025).

Batting — Home / Away

Jack O'Connor — Batting — Home / Away
Split	G	AB	R	H	HR	RBI	AVG
Home	71	0	0	0	0	0	—
Away	58	0	0	0	0	0	—

Pitching — Home / Away

Jack O'Connor — Pitching — Home / Away
Split	G	IP	H	ER	BB	SO	ERA
Home	71	178.2	194	88	80	96	4.43
Away	58	140.0	149	86	83	81	5.53

Last 10 Games — Pitching

Jack O'Connor — Last 10 Games — Pitching
Date	Tm	Opp	Dec	IP	H	R	ER	BB	SO
1987-10-03	BAL	NYY	—	0.2	1	0	0	0	0
1987-09-27	BAL	NYY	W	1.0	3	0	0	0	0
1987-09-23	BAL	TOR	—	2.0	2	0	0	1	0
1987-09-22	BAL	TOR	—	0.1	0	0	0	0	1
1987-09-18	BAL	BOS	SV	2.1	1	0	0	0	2
1987-09-14	BAL	TOR	—	0.2	0	0	0	0	1
1987-09-11	BAL	BOS	—	0.1	1	0	0	1	1
1987-09-09	BAL	DET	—	3.1	3	1	1	2	0
1987-09-07	BAL	DET	—	1.1	1	0	0	0	1
1987-09-06	BAL	OAK	—	1.0	1	0	0	0	0

Fielding Statistics

Career Fielding Totals by Position

Jack O'Connor — Career Fielding Totals by Position
Position	G	GS	PO	A	E	DP
P	129	28	10	23	3	5

Season-by-Season Fielding

Jack O'Connor — Season-by-Season Fielding
Year	Team	Pos	G	GS	PO	A	E	DP
1981	MIN	P	28	0	2	8	2	3
1982	MIN	P	23	19	3	6	0	0
1983	MIN	P	27	8	2	6	0	0
1984	MIN	P	2	0	0	0	0	0
1985	MON	P	20	1	0	1	0	1
1987	BAL	P	29	0	3	2	1	1

Career Games by Position

Position Diamond

Circle size = games played at each position.

Jack O'Connor — Career Games by Position
Position	Games
Pitcher	129

Salary History

Jack O'Connor — Salary History
Year	Team	League	Salary
1987	BAL	AL	$85,000
Total Career Earnings			$85,000

Jack O'Connor: the record in brief

Between the debut on April 9, 1981 and the final game on October 3, 1987, Jack O'Connor built the record summarized on this page. By club, O'Connor's seasons break down as the Minnesota Twins (1981 to 1984), the Montreal Expos (1985), and the Baltimore Orioles (1987). Born on June 2, 1958, in Twenty-Nine Palms, CA, USA, O'Connor is listed as a pitcher and both batted and threw left-handed. O'Connor's listed size is 215 pounds on a 6-foot-3 frame. Jack O'Connor was the playing name; the full given name is Jack William.

The pitching table credits O'Connor with a 14-17 record and a 4.89 ERA in 129 games. The totals include 177 strikeouts. The league ERA over O'Connor's seasons was 3.90, so the 4.89 figure ran 25.2% worse than average. No season topped the 8 wins of 1982. 1982 was O'Connor's sharpest full season, a 4.29 ERA against the league's 3.86.

O'Connor appears at one position only: pitcher, in 129 games. On the mound, O'Connor's fielding totals are 10 putouts, 23 assists and 3 errors.

The one salary on file is $85,000, for 1987. The game-log section draws on 258 games of Retrosheet box scores for O'Connor.

Frequently Asked Questions about Jack O'Connor

What years did Jack O'Connor play?: Jack O'Connor played in Major League Baseball from 1981 to 1987.
Was Jack O'Connor a pitcher?: Yes. Jack O'Connor pitched in the major leagues, recording 14 wins and 177 strikeouts.
What was Jack O'Connor's career ERA?: Jack O'Connor finished with a 4.89 career ERA, going 14-17 with 177 strikeouts.
How many strikeouts did Jack O'Connor have?: Jack O'Connor recorded 177 career strikeouts.
Is Jack O'Connor in the Hall of Fame?: No. Jack O'Connor has not been inducted into the National Baseball Hall of Fame.
What teams did Jack O'Connor play for?: Jack O'Connor played for the Minnesota Twins, the Montreal Expos, and the Baltimore Orioles.