Lefty O'Brien boxer
- bouts
- 1
- won
- 1
- lost
- 0
- draw
- 0
- Status
- inactive
- Division
- featherweight
- Debut
- 1930-07-15
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1934-06-05 | Speed Ricco | LDDWDL | Riverview Park, Des Moines | LOST |
| 1933-10-16 | Frank Spenney | debut | Burlington | LOST |
| 1933-07-26 | Bobby McLaughlin | LLLWDL | Boone | DRAW |
| 1933-07-25 | Jimmie O'Connor | debut | Oskaloosa | DRAW |
| 1932-10-17 | Sailor O'Connor | WDDWWW | Coliseum, Des Moines | LOST |
| 1930-10-16 | Al Manriquez | WLWWWD | Iowa Theatre, Atlantic | LOST |
| 1930-09-16 | Al Manriquez | WWLWWW | Legion Memorial Building, Atlantic | DRAW |
| 1930-08-19 | Frankie Dunn | WDL | Forest Park, Marshalltown | DRAW |
| 1930-08-13 | Frankie Dunn | WD | Coliseum, Des Moines | WIN |
| 1930-08-05 | Frankie Dunn | W | Riverview Park, Des Moines | DRAW |
| 1930-08-01 | Cliff Staples | debut | Riverview Park, Des Moines | WIN Technical knockout |
| 1930-07-25 | Tommy Maroon | WWLWLL | Riverview Park, Des Moines | DRAW |
| 1930-07-22 | Benny Williams | DWL | Riverview Park, Des Moines | WIN |
| 1930-07-18 | Benny Williams | DW | Riverview Park, Des Moines | WIN |
| 1930-07-15 | Kid Rhoda | DD | Riverview Park, Des Moines | WIN |
