Jack O'Brien
1899–1903 · bats L / throws R · Boston Red Sox, Cleveland Guardians, Washington Senators (1901-60), Washington Senators (1897-99)
326G
.259AVG
.308OBP
.335SLG
More career statistics
317H
9HR
133RBI
42SB
2Rare feats
Career summary: MLB’s official regular-season totals. Season lines, splits and historical game logs below are reconstructed from the covered Retrosheet records and can differ in coverage or scorer revisions. Compare sources and coverage.
Why official totals and the game-record sums differ
The sources can disagree on historical scorer decisions, appearances, and which games belong to a major-league record. The career summary uses the official total; the source game rows retain their recorded values.
| Statistic | MLB official | Recorded game sum |
|---|---|---|
| Batting · At bats | 1,226 | 1,227 |
| Batting · Hit by pitch | 11 | 14 |
| Batting · Plate appearances | 1,348 | 1,351 |
| Batting · Walks | 77 | 72 |
Career batting
| G | PA | AB | R | H | 2B | 3B | HR | RBI | BB | K | SB | CS | HBP | SF | TB | AVG | OBP | SLG | OPS |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 326 | 1,348 | 1,226 | 171 | 317 | 39 | 14 | 9 | 133 | 77 | 0 | 42 | 0 | 11 | 0 | 411 | .259 | .308 | .335 | .643 |
Streaks
14longest hitting streak · 1901-06-19 to 1901-07-03
17longest on-base streak
The three rarest things in this career
| Rarity | What | Date | Rate | Game |
|---|---|---|---|---|
| 43 | Five for Five | 1899-06-20 | 1 in 135 games | box score ↗ |
| 40 | Three-Steal Game | 1899-07-03 | 1 in 96 games | box score ↗ |
| 39 | 2 triples | 1899-08-29 | 1 in 1,837 player-games | box score ↗ |
Splits
Regular season only.
Home and away
| G | PA | H | HR | RBI | BB | K | AVG | OBP | SLG | |
|---|---|---|---|---|---|---|---|---|---|---|
| Home | 170 | 696 | 162 | 6 | 74 | 37 | 39 | .257 | .286 | .330 |
| Away | 156 | 655 | 155 | 3 | 59 | 35 | 35 | .260 | .290 | .341 |
By month
| G | PA | H | HR | RBI | BB | K | AVG | OBP | SLG | |
|---|---|---|---|---|---|---|---|---|---|---|
| April | 24 | 96 | 15 | 0 | 6 | 6 | 2 | .172 | .219 | .184 |
| May | 42 | 158 | 26 | 0 | 8 | 5 | 11 | .177 | .196 | .231 |
| June | 60 | 265 | 72 | 2 | 27 | 17 | 15 | .301 | .336 | .427 |
| July | 79 | 344 | 69 | 3 | 41 | 18 | 19 | .224 | .253 | .286 |
| August | 57 | 232 | 74 | 2 | 31 | 12 | 13 | .343 | .371 | .444 |
| September | 53 | 215 | 50 | 2 | 16 | 11 | 13 | .259 | .284 | .321 |
| October | 11 | 41 | 11 | 0 | 4 | 3 | 1 | .297 | .341 | .351 |
Most-faced opponents
| G | PA | H | HR | RBI | BB | K | AVG | OBP | SLG | |
|---|---|---|---|---|---|---|---|---|---|---|
| chicago-white-sox | 29 | 127 | 25 | 0 | 12 | 4 | 9 | .210 | .228 | .269 |
| philadelphia-athletics | 24 | 93 | 24 | 1 | 11 | 4 | 8 | .270 | .301 | .371 |
| washington-senators-1901-60 | 23 | 99 | 28 | 0 | 9 | 3 | 5 | .308 | .313 | .385 |
| detroit-tigers | 23 | 94 | 15 | 1 | 11 | 6 | 12 | .176 | .223 | .294 |
| baltimore-orioles-1901-02 | 22 | 98 | 24 | 0 | 7 | 8 | 3 | .279 | .327 | .314 |
| boston-red-sox | 21 | 87 | 14 | 0 | 7 | 2 | 0 | .169 | .184 | .229 |
| st-louis-browns | 17 | 68 | 14 | 0 | 5 | 2 | 5 | .230 | .235 | .295 |
| new-york-yankees | 16 | 66 | 12 | 1 | 6 | 6 | 5 | .207 | .273 | .345 |
Season by season
| Year | Team | G | AB | H | HR | RBI | SB | AVG | IP | K |
|---|---|---|---|---|---|---|---|---|---|---|
| 1899 | WSWashington Senators (1897-99) | 127 | 467 | 132 | 6 | 51 | 17 | .283 | – | – |
| 1901 | Cleveland Guardians, Washington Senators (1901-60) | 103 | 421 | 114 | – | 44 | 15 | .271 | – | – |
| 1903 |  Boston Red Sox | 96 | 339 | 71 | 3 | 38 | 10 | .209 | – | – |