What years did Jack O'Brien play?

Jack O'Brien played in Major League Baseball from 1899 to 1903.

Was Jack O'Brien a pitcher?

No. Jack O'Brien was a position player (Outfielder).

How many home runs did Jack O'Brien hit?

Jack O'Brien hit 9 career home runs with 317 hits.

What was Jack O'Brien's career batting average?

Jack O'Brien batted .259 over his career, with 317 hits in 1,226 at bats.

How many RBI did Jack O'Brien have?

Jack O'Brien drove in 133 runs in his career.

Is Jack O'Brien in the Hall of Fame?

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

Jack O'Brien

Outfielder · Career Stats, Bio & Records (1899-1903)

Jack O'Brien was an outfielder who played in Major League Baseball from 1899 to 1903 for 4 teams, including the Washington Nationals, a span of 5 seasons. In 326 career games, he hit .259 with 317 hits, 9 home runs, and 133 RBI.

AVG (Batting Average):: Hits divided by at bats. .300 is the traditional mark of an excellent hitter.
HR (Home Runs):: Hits on which the batter circled the bases and scored, almost always by clearing the outfield fence.
RBI (Runs Batted In):: Runs that scored as a direct result of a batter's plate appearance.
OPS (On-Base Plus Slugging):: On-base percentage plus slugging percentage, the quickest single summary of offensive value. .900 or better is star-level.

Data updated October 12, 2026

AVG .259

HR 9

RBI 133

H 317

OPS .643

PIV -1,032

Position: Outfielder
Bats / Throws: L / R
Height / Weight: 6'1" / 165 lb
Born: 2/5/1873 in Watervliet, NY, USA
Died: 6/10/1933 in Watervliet, NY, USA
MLB Debut: 1899-04-14
Last Game: 1903-09-28

Full name: John Joseph O'Brien

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Career Batting Statistics

Jack O'Brien — Career Batting Statistics
G	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	OBP	SLG	OPS	PIV
326	1,226	171	317	39	14	9	133	42	77	92	.259	.308	.335	.643	-1,032

Career AVG .259 vs. league average .271 across their career seasons — near league average.

Career OBP .308 vs. league average .328 across their career seasons — 6.1% below league average.

Career SLG .335 vs. league average .357 across their career seasons — 6.1% below league average.

Career OPS .643 vs. league average .685 across their career seasons — 6.1% below league average.

Season-by-Season Batting

Career Arc

Click a stat to plot it across every season.

Jack O'Brien — Season-by-Season Batting
Year	Team	Lg	G	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	Lg AVG	Lg OBP	Lg SLG	Lg OPS	PIV
1899	WAS	NL	127	468	68	132	11	5	6	51	17	31	32	.282	.282 (avg)	.343 (-4%)	.366 (avg)	.710 (-2%)	-175.0
1901	WS1	AL	11	45	5	8	0	0	0	5	2	3	3	.178	—	—	—	—	0.0
1901	CLE	AL	92	375	54	106	14	5	0	39	13	22	20	.283	.271 (+4%)	.326 (+1%)	.359 (-4%)	.686 (-2%)	0.0
1903	BOS	AL	96	338	44	71	14	4	3	38	10	21	37	.210	.261 (-20%)	.316 (-17%)	.345 (-13%)	.662 (-15%)	-775.0
Career · 4 seasons			326	1,226	171	317	39	14	9	133	42	77	92	.259	—	—	—	—	-950

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.

Postseason Statistics

Playoff Career Batting

Jack O'Brien — Playoff Career Batting
G	AB	R	H	2B	3B	HR	RBI	BB	SO	AVG
2	2	0	0	0	0	0	0	0	1	.000

Playoff Batting by Year

Jack O'Brien — Playoff Batting by Year
Year	Round	Team	G	AB	R	H	2B	3B	HR	RBI	BB	SO	AVG
1903	WS	BOS	2	2	0	0	0	0	0	0	0	1	.000

Game Log & Splits

View full game log (326 games) →

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

Batting — Home / Away

Jack O'Brien — Batting — Home / Away
Split	G	AB	R	H	HR	RBI	AVG
Home	170	631	89	162	6	74	.257
Away	156	596	82	155	3	59	.260

Last 10 Games — Batting

Jack O'Brien — Last 10 Games — Batting
Date	Tm	Opp	Res	AB	R	H	2B	RBI	BB	SO
1903-09-28	BOS	SLA	W	1	0	0	0	0	0	0
1903-09-28	BOS	SLA	W	4	1	2	0	0	1	0
1903-09-26	BOS	SLA	L	3	0	2	1	1	0	0
1903-09-26	BOS	SLA	W	4	0	0	0	0	0	3
1903-09-25	BOS	DET	L	5	1	1	0	0	0	0
1903-09-24	BOS	DET	W	4	2	2	0	0	0	0
1903-09-23	BOS	DET	L	4	2	1	0	0	0	0
1903-09-23	BOS	DET	L	5	0	0	0	0	0	1
1903-09-22	BOS	CHW	L	4	0	0	0	0	0	0
1903-09-15	BOS	NYY	W	1	0	0	0	0	0	0

Fielding Statistics

Career Fielding Totals by Position

Jack O'Brien — Career Fielding Totals by Position
Position	G	PO	A	E	DP
2B	4	4	7	4	0
3B	16	16	27	9	4
OF	295	570	39	41	11
SS	1	0	0	0	0

Season-by-Season Fielding

Jack O'Brien — Season-by-Season Fielding
Year	Team	Pos	G	PO	A	E	DP
1899	WAS	3B	4	5	10	6	1
1899	WAS	OF	121	266	21	23	5
1901	WS1	OF	11	26	0	2	0
1901	CLE	3B	1	1	2	0	0
1901	CLE	OF	92	150	9	10	4
1903	BOS	2B	4	4	7	4	0
1903	BOS	3B	11	10	15	3	3
1903	BOS	OF	71	128	9	6	2
1903	BOS	SS	1	0	0	0	0

Career Games by Position

Position Diamond

Circle size = games played at each position.

Jack O'Brien — Career Games by Position
Position	Games
Second Base	4
Third Base	16
Shortstop	1
Left Field	165
Center Field	68
Right Field	62

Most Similar Players

Career comps based on counting + rate stats and primary position. Score is relative — closest peer anchors at ~98%.

Career Spans

Jack O'Brien (highlighted) compared to peers across the same era.

Jack O'Brien: the record in brief

The profile opens with Jack O'Brien's first major league game on April 14, 1899; the last one listed came on September 28, 1903. The team column moves through the Washington Senators (1899 through 1901), the Cleveland Blues (1901), and the Boston Americans (1903). O'Brien, an outfielder by primary position, hit left-handed while throwing right-handed. The recorded size is 6'1" and 165 pounds. O'Brien was born on February 5, 1873, in Watervliet, NY, USA. The bio records the death on June 10, 1933, in Watervliet, NY, USA. Jack O'Brien was the playing name; the full given name is John Joseph.

O'Brien finished with 317 hits from 1,226 at bats in 326 games, which works out to .259, plus 9 homers, 133 runs batted in, and 42 stolen bases. On-base and slugging figures of .308 and .335 give O'Brien a career OPS of .643. The .259 career average is close to the .271 the league hit across the same seasons. No season topped the 132 hits of 1899. Among the seasons with the heaviest workload, the best average was .283 in 1901, 4% above that year's league mark of .271.

Frequently Asked Questions about Jack O'Brien

What years did Jack O'Brien play?: Jack O'Brien played in Major League Baseball from 1899 to 1903.
Was Jack O'Brien a pitcher?: No. Jack O'Brien was a position player (Outfielder).
How many home runs did Jack O'Brien hit?: Jack O'Brien hit 9 career home runs with 317 hits.
What was Jack O'Brien's career batting average?: Jack O'Brien batted .259 over his career, with 317 hits in 1,226 at bats.
How many RBI did Jack O'Brien have?: Jack O'Brien drove in 133 runs in his career.
Is Jack O'Brien in the Hall of Fame?: No. Jack O'Brien has not been inducted into the National Baseball Hall of Fame.