Pat O'Brien boxer
- bouts
- 19
- won
- 11
- lost
- 4
- draw
- 4
- Status
- inactive
- Division
- lightweight
- Debut
- 1934-02-19
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1937-02-24 | Abe Denner | debut | Mechanics Building, Boston | LOST Unanimous decision |
| 1937-02-22 | Paul Andrews | debut | Egleston Square Stadium, Boston | WIN Points |
| 1937-02-04 | Lucio Lima | LLLLWW | Egleston Square Stadium, Boston | DRAW Points |
| 1937-01-25 | Sammy Tenore | LLDLLD | Mechanics Building, Boston | WIN Majority decision |
| 1937-01-15 | Sammy Tenore | LLLDLL | Mechanics Building, Boston | DRAW Points |
| 1937-01-01 | Joe Gorman | LLLWDL | Boston Garden, Boston | DRAW Points |
| 1936-11-26 | Sammy Tenore | WLLLDL | Arena, Quincy | WIN Points |
| 1936-11-12 | Blondy Russell | LWD | Arena, Quincy | WIN Points |
| 1936-11-06 | Sammy Tenore | LLWLLL | Arena, Boston | DRAW Points |
| 1936-10-23 | Johnny Burns | debut | Arena, Boston | WIN Points |
| 1936-10-16 | Sammy Tenore | WWLLWL | Arena, Boston | WIN Points |
| 1936-06-01 | Bobby (Red) Woods | WWWWWW | Valley Arena, Holyoke | LOST Unanimous decision |
| 1936-05-04 | Babe Wood | WWLLL | Arena, Lynn | LOST KO |
| 1936-03-20 | George McKinley | L | Boston Garden, Boston | WIN Technical knockout |
| 1936-03-12 | Tony Saunders | LWLWWL | North Street Arena, Salem | WIN Points |
| 1936-02-24 | Ernie Gomes | debut | Arena, Lynn | WIN Points |
| 1934-03-09 | Joe Geno | debut | Arena, Quincy | LOST Technical knockout |
| 1934-02-19 | Al Jolson | LWLLLL | North Street Arena, Salem | WIN Points |