Bobby O'Brien boxer
- bouts
- 12
- won
- 10
- lost
- 2
- draw
- 0
- Status
- inactive
- Division
- lightweight
- Debut
- 1941-10-21
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1942-02-27 | Billy Marcus | LLLWLL | Duwell Arena, Norwich | WIN Points |
| 1942-02-24 | Joey Wasnick | LLLDDD | Foot Guard Hall, Hartford | WIN KO |
| 1942-02-17 | Billy Marcus | LLLLLW | Foot Guard Hall, Hartford | WIN Points |
| 1942-02-10 | Bob Frechette | D | Foot Guard Hall, Hartford | WIN Points |
| 1942-02-02 | Billy Marcus | LLLLLL | Valley Arena, Holyoke | WIN Majority decision |
| 1942-01-27 | Billy Marcus | WLLLLL | Foot Guard Hall, Hartford | WIN Points |
| 1941-12-15 | Don Lyons | WLWWLW | Valley Arena, Holyoke | WIN Unanimous decision |
| 1941-12-01 | Joe Birch | DDWWWW | Valley Arena, Holyoke | WIN Split-decision |
| 1941-11-21 | Bobby Henderson | LLLLLL | Buckingham Hall, Waterbury | WIN Points |
| 1941-11-17 | Don Lyons | WWLWWL | Valley Arena, Holyoke | LOST Split-decision |
| 1941-11-03 | Jimmy Morro | WLWWWW | Valley Arena, Holyoke | LOST Unanimous decision |
| 1941-10-21 | Mel Scalzone | L | Foot Guard Hall, Hartford | WIN KO |