Doc MacKenzie
George O. MacKenzie
Birthplace: Philadelphia, Pennsylvania
Born: July 16, 1906
Died: August 23, 1936
| Driver sponsorship available. This one's yours for $5. |
| Year | Series | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles | Points | Standing |
| 1930 | AAA | 0 | 2 | 0 | 0 | 0 | 0 | 0 | NS | 0 | 0 |
NR |
| 1931 | AAA | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 | 30 | 27 |
| 1932 | AAA | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 7 | 0 | 40 | 23 |
| 1933 | AAA | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 18 | 0 | 0 | NR |
| 1934 | AAA | 2 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 140 | 15 | |
| 1935 | AAA | 3 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 170 | 10 | |
| 1936 | AAA | 2 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 362 | 4 | |
| Total | 11 | 6 | 0 | 0 | 2 | 2 | 0 | 1 | 742 |
| Track Type | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Brick Oval | 5 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | |
| Dirt Oval | 5 | 5 | 0 | 0 | 1 | 1 | 0 | 0 | |
| Road Course | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
| Series | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| AAA | 11 | 6 | 0 | 0 | 2 | 2 | 0 | 1 |
| Start # | Date | Track | Type | Series | Car # | Sponsor/Name | Chassis | Engine | Start | Finish | Laps | Status |
Points |
| -- | 5/30/1930 | Indianapolis | BR | AAA | 43 | Ambler | Ambler | Buick | -- | -- | -- | Did not qualify | |
| -- | 6/9/1930 | Detroit | DO | AAA | 43 | Ambler | Ambler | Buick | -- | -- | -- | Wreck practice | |
| 1 | 9/12/1931 | Syracuse | DO | AAA | 22 | Hawkeye | X | X | 13 | 8 | 100 | 1:29:36.41 66.959 | 30 |
| 2 | 5/30/1932 | Indianapolis | BR | AAA | 42 | Brady | Studebaker | Studebaker | 39 | 28 | 65 | Engine | |
| -- | 6/5/1932 | Detroit 1 | DO | AAA | 42 | Brady | Studebaker | Studebaker | -- | -- | -- | DNS, too slow | |
| -- | 6/19/1932 | Roby | DO | AAA | X | X | X | X | -- | -- | -- | Did not qualify | |
| 3 | 7/2/1932 | Syracuse | DO | AAA | 42 | Brady | Studebaker | Studebaker | 16 | 7 | 70 | Flagged - rain | 40 |
| 4 | 5/30/1933 | Indianapolis | BR | AAA | 51 | Nardi | Duesenberg | Studebaker | 39 | 18 | 192 | Broken rear axle | |
| NC | 7/17/1933 | Milwaukee | DO | AAA | 71 | Miller | X | X | X | 16 | X | X | |
| -- | 9/9/1933 | Syracuse | DO | AAA | 51 | Brady | X | X | -- | -- | -- | Did not qualify | |
| 5 | 5/30/1934 | Indianapolis | BR | AAA | 73 | Cresco | Mikan-Cars | Studebaker | 26 | 29 | 15 | Wrecked | |
| -- | 9/9/1934 | Syracuse | DO | AAA | X | Miller | X | Miller | -- | -- | -- | Did not qualify | |
| 6 | 12/23/1934 | Mines Field | RC | AAA | 55 | Pirrung | X | Miller | 1 | 4 | 123 | Flagged | 140 |
| 7 | 5/30/1935 | Indianapolis | BR | AAA | 8 | Pirrung | Rigling | Miller | 15 | 9 | 200 | 4:58:13.01 100.598 | 100 |
| 8 | 8/24/1935 | Springfield | DO | AAA | 44 | Bowes Seal Fast | Stevens | Miller | 2 | 10 | 47 | Engine running rough | |
| 9 | 9/2/1935 | Syracuse | DO | AAA | 44 | Bowes Seal Fast | Stevens | Miller | 6 | 4 | 100 | 1:12:37.74 82.652 | 70 |
| 10 | 5/30/1936 | Indianapolis | BR | AAA | 10 | Gilmore Speedway | Wetteroth | Offy | 4 | 3 | 200 | 4:39:10.36 107.460 | 282 |
| 11 | 6/20/1936 | Goshen | DO | AAA | 10 | Gilmore Products | Wetteroth | Miller | 7 | 3 | 100 | 1:18:53.36 76.055 | 80 |