Harry J. Horstman
Birthplace:
Born:
Died: November 1916
Harry Horstman
Harry J. Horstman
Birthplace:
Born:
Died: November 1916
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| Year | Series | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles | Points | Standing |
| 1916 | AAA | 0 | 0 | 0 | 0 | 0 | 0 | 0 | NS | 0 | 0 | NR |
| Total | 0 | 0 | 0 | 0 | 0 | 0 | 0 | NS | 0 | 0 |
| Track Type | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Road Course | 0 | 0 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Series | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| AAA | 0 | 0 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Start # | Date | Track | Type | Series | Car # | Sponsor/Name | Chassis | Engine | Start | Finish | Laps | Status |
Points |
| -- | 11/16/1916 | Santa Monica 1 | RC | AAA | 5 | Mercer | Mercer | Mercer | -- | -- | -- | Wrecked practice - fatal | |
**Horstman was not an official entrant in this event, and took to the track without permission. That is why he is not shown as having an entry.**
Known riding mechanics for this driver:
| Date | Track | Type | Mechanic | Car # | Sponsor/Name | Chassis | Engine | Start | Finish | Laps | Status |
| 11/16/1916 | Santa Monica 1 | RC | Charles Swartz | 5 | Mercer | Mercer | Mercer | -- | -- | -- | Wrecked practice - fatal |