Philadelphia Jack O'Brien
147–16 · 162 recorded bouts · 1896–1911
147–16–24
Philadelphia Jack O'Brien finished 37% of 147 wins inside the distance — the 16th percentile for middleweight boxing, where the median is 60%. No reach is on record, so this page compares record rather than measurements.
SOURCE·Philadelphia Jack O'Brien — English Wikipedia (CC BY-SA 4.0)·derived figures computed here·REVIEWED 2026-07-07
How this record is compiled
- Measurements come from the fighter's English Wikipedia infobox; the bout list is parsed from the results table on the same article, read on 2026-07-07. Boxing tables are read by header name and MMA records by the fixed column order of the
MMA recordtemplate — two different parsers, because reading MMA rows as a boxing table returns a fighter's boxing record in place of their real one. - A bout enters the ledger with whatever fields the source states: result, opponent, method, round, year. Any field the source leaves empty stays empty here. A date that cannot be established is left blank rather than inferred, and the bout is still counted.
- A no contest is counted and printed as a no contest. It is never folded into the wins, the losses or the draws, and it never disappears to make a total balance.
- Where the article's infobox total disagrees with its own results table, both figures are published and each is labelled with where it came from. Nothing is averaged and nothing is reconciled against a second database.
- Percentiles rank this fighter among the 256 middleweight boxing fighters in the dataset — the most specific group of at least 30 that this fighter belongs to.
Bout record
Every bout the article's own results table lists, in order. A dash is a field the source leaves empty — it is not a zero and it is not a guess.
| Year | Result | Opponent | Method | Rd |
|---|---|---|---|---|
| 1911 | L | Sam Langford | KO/TKO | 5 |
| 1910 | L | Ben Koch | — | 6 |
| 1910 | L | Harry Ramsey | — | 6 |
| 1910 | W | Mike Schreck | — | 10 |
| 1910 | L | Al Kaufman | — | 6 |
| 1910 | L | Sam Langford | KO/TKO | 5 |
| 1909 | W | Charley Stevenson | — | 6 |
| 1909 | W | Fireman Jim Flynn | — | 6 |
| 1909 | L | Stanley Ketchel | KO/TKO | 3 |
| 1909 | D | Jack Johnson | Draw | 6 |
| 1909 | W | Fred Cooley | Decision | 2 |
| 1908 | W | George Cole | — | 6 |
| 1908 | W | Tom Lenihan | KO/TKO | 4 |
| 1908 | W | Larry Temple | — | 6 |
| 1908 | W | Jack Rush | KO/TKO | 7 |
| 1908 | W | Jack Blackburn | — | 6 |
| 1908 | W | Jack Bonner | — | 6 |
| 1908 | D | Bob Ward | Decision | 10 |
| 1907 | W | Bill Heveron | KO/TKO | 1 |
| 1907 | L | Tommy Burns | Decision | 20 |
| 1907 | W | Abdul 'The Turk' Malgan | DQ | 5 |
| 1906 | D | Tommy Burns | Decision | 20 |
| 1906 | W | Fred Cooley | KO/TKO | 3 |
| 1906 | W | Jim Tremble | KO/TKO | 9 |
| 1906 | W | Ted Beecham | KO/TKO | 2 |
| 1906 | D | Sam Berger | Draw | 6 |
| 1905 | W | Bob Fitzsimmons | KO/TKO | 13 |
| 1905 | W | Al Kaufman | KO/TKO | 17 |
| 1905 | W | Bill Bates | DQ | 6 |
| 1905 | D | Jack Twin Sullivan | Decision | 20 |
| 1905 | L | Hugo Kelly | Decision | 10 |
| 1905 | W | Young Peter Jackson | Decision | 10 |
| 1905 | W | John Willie | — | 6 |
| 1904 | W | Morris Harris | — | 6 |
| 1904 | W | Larry Temple | — | 6 |
| 1904 | W | Black Bill | — | 6 |
| 1904 | W | Dixie Kid | — | 6 |
| 1904 | W | John Willie | — | 6 |
| 1904 | W | Jim Jeffords | KO/TKO | 3 |
| 1904 | W | Tommy Burns | — | 6 |
| 1904 | W | Joe Butler | KO/TKO | 1 |
| 1904 | W | Billy Stift | KO/TKO | 2 |
| 1904 | W | Hugo Kelly | — | 6 |
| 1904 | L | Bob Fitzsimmons | — | 6 |
| 1904 | W | George Cole | — | 6 |
| 1904 | D | Charles Kid McCoy | Draw | 6 |
| 1904 | W | Kid Carter | KO/TKO | 3 |
| 1904 | W | Jack Twin Sullivan | KO/TKO | 3 |
| 1904 | W | Mike Schreck | Decision | 15 |
| 1904 | W | Charles Mack | KO/TKO | 3 |
| 1904 | D | Tommy Ryan | Draw | 6 |
| 1903 | D | Hugo Kelly | Decision | 10 |
| 1903 | W | Jim Jeffords | — | 6 |
| 1903 | W | Jack Twin Sullivan | Decision | 15 |
| 1903 | W | Diamond Dick Torpey | Decision | 6 |
| 1903 | W | Mike Schreck | Decision | 6 |
| 1903 | W | Jack Williams | KO/TKO | 3 |
| 1903 | W | Bill Heveron | KO/TKO | 4 |
| 1903 | W | Jack Mullen | KO/TKO | 8 |
| 1903 | W | Charlie Haghey | KO/TKO | 3 |
Showing 60 of 162 recorded bouts, most recent first.
28 of these opponents have their own page here.
SOURCE·Philadelphia Jack O'Brien — English Wikipedia (CC BY-SA 4.0)·derived figures computed here·REVIEWED 2026-07-07
What is on record
| Reach | not recorded | |
|---|---|---|
| Height | 70″ (177.8 cm) | |
| Stance | Orthodox | |
| Division | Middleweight Boxing competed at 3: heavyweight, light heavyweight, middleweight — compared here against the last | |
| Most active decade | 1900s — 116 of 161 dated bouts | |
| Country | United States |
Wikipedia carries no reach figure for Philadelphia Jack O'Brien, so the reach-advantage comparison this site is built on cannot be computed. Everything below comes from the record instead.
Record
Boxing record
147–16
192 bouts on record
Finish rate
37%
of wins ended inside the distance — middleweight boxing median 60%, 16th percentile
The career, bout by bout
162 recorded bouts from 1896 to 1911. Every incumbent shows this as a table you have to read; here it is as a shape you can see.
Career span
16y
1896–1911
Longest unbeaten run
49
without a loss — draws do not break it
Busiest year
1902
25 bouts
Recorded bouts
162
161 with a date
What this record does and does not say
- What is Philadelphia Jack O'Brien's record?
- 147–16–24 in boxing. That is the aggregate stated in the English Wikipedia infobox; the results table on the same article lists 162 bouts individually.
- How many of Philadelphia Jack O'Brien's bouts have no date?
- 1 of 162. The source lists them without a date this site can read, so they are printed with no year, sorted last, and drawn past the double rule in the record line rather than placed in the chronology. No year has been inferred for any of them.
- Does a no contest change a record here?
- No. A no contest is not a win, a loss or a draw, and it is never folded into one. It is counted and printed separately, so a 20–0 record with two no contests is shown as exactly that rather than as 22–0 or as 20–0 with the no contests dropped. The same applies to a bout overturned after the fact where the source records the change.
- What happens when sources disagree about a fight?
- This site publishes one source — the fighter's English Wikipedia article, read on the date printed under every table — and it does not silently reconcile that against anyone else's database. Where the article's own infobox total and its own results table disagree, both are shown and the page says which one each figure came from. Nothing is averaged, and no field is filled in from a second source to make a total balance.
Where this record leads
The 269 middleweight boxing fighters this record is ranked against, and the distribution O'Brien sits inside.
269 FIGHTERS Robert Fitzsimmons vs Philadelphia Jack O'BrienA bout both records confirm — set out side by side, with every opponent the two men have in common.
1904 Longest unbeaten runsPhiladelphia Jack O'Brien went 49 without a loss. This is where that sits against every run on the site.
LEADERBOARD