Dewey Grennan boxer
- bouts
- 12
- won
- 7
- lost
- 4
- draw
- 1
- Status
- inactive
- Division
- welterweight
- Debut
- 1917-03-13
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1922-10-18 | Earl Force | WWWW | Association Club, San Francisco | LOST Points |
| 1922-09-19 | Jimmy Butler | WWLWWL | Arcadia Pavilion, San Francisco | LOST Points |
| 1921-10-28 | Charlie Fitzgerald | WWW | Dreamland Rink, San Francisco | WIN Technical knockout |
| 1921-10-21 | George Ross | WWWWD | Dreamland Rink, San Francisco | DRAW Points |
| 1921-10-07 | Ernie Lundgren | WWDL | Dreamland Rink, San Francisco | LOST Points |
| 1921-09-09 | Mickey O'Donnell | DWLW | Coliseum, San Francisco | WIN Technical knockout |
| 1921-09-02 | Johnny Driscoll | debut | Coliseum, San Francisco | WIN KO |
| 1921-08-08 | Tommy Comiskey | L | Vallejo | LOST Points |
| 1921-07-29 | Tommy West | LWL | Coliseum, San Francisco | WIN Points |
| 1921-07-22 | Jimmy Brady | D | Coliseum, San Francisco | WIN Technical knockout |
| 1917-03-30 | Gene Cline | debut | Dreamland Rink, San Francisco | WIN Points |
| 1917-03-13 | Joe Lynch | L | Valencia Theater, San Francisco | WIN KO |
