Jeffrey Diffenderfer is a racing driver who last raced in NASA for Mazda Miata. Diffenderfer has recorded 0 wins and 0 podiums from 21 starts.[1]
A Racer Rating of 766 ranks Diffenderfer 36503th of 40,200 indexed drivers, on an Elo scale where the strongest reach the high 8,000s. It is built from every indexed race in the driver's file, decayed for time since their last race.
| 2011-04-10 | Mid-Ohio Sports Car Course PTE | P4 | −8 |
| 2011-04-09 | Mid-Ohio Sports Car Course PTE | P4 | −7 |
| Rating won | Race | Series | Finish |
|---|---|---|---|
| +76 | Autobahn Country Club 2006 | NASA | P4 |
| +63 | Mid-Ohio Sports Car Course 2009 | NASA | P9 |
| +62 | Grattan Raceway 2009 | NASA | P4 |
| +57 | Grattan Raceway 2009 | NASA | P4 |
| +34 | Mid-Ohio Sports Car Course 2007 | NASA | P15 |
| Season | Series | Team | Races | Wins | Podiums | DNFs | Poles | Points | Pos | Gain/Loss | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2011 | ▸NASA | Mazda Miata | 2 | 0 | 0 | 0 | 0 | 0 | P30 | −15 | 766 |
| 2009 | ▸NASA | Saginaw MI | 5 | 0 | 0 | 0 | 0 | 0 | P48 | +220 | 781 |
| 2008 | ▸NASA | Fireball Racing | 4 | 0 | 0 | 0 | 0 | 0 | P89 | −209 | 561 |
| 2007 | ▸NASA | Fireball Racing | 3 | 0 | 0 | 0 | 0 | 0 | P60 | +6 | 770 |
| 2006 | ▸NASA | Miata | 7 | 0 | 0 | 0 | 0 | 0 | P24 | −586 | 764 |
| Rival | Rating | Raced | Ahead | Behind | Record |
|---|---|---|---|---|---|
| 🇬🇧 Jeff Davidson | 768 | 17 | 5 | 12 | 29% |
| 🏳️ Dan Fargo | 1,060 | 13 | 2 | 11 | 15% |
| 🏳️ Brian Flint | 586 | 11 | 4 | 7 | 36% |
| 🏳️ Brian Murdick | 1,509 | 10 | 0 | 10 | 0% |
| 🏳️ Dennis Joynt | 1,484 | 10 | 1 | 9 | 10% |
| 🇬🇧 Eric Meyer | 1,211 | 10 | 4 | 6 | 40% |
| 🇺🇸 David Spencer | 1,494 | 9 | 0 | 9 | 0% |
| 🏳️ Randy Shaw | 1,850 | 8 | 3 | 5 | 38% |
| 🏳️ John Guthrie | 1,817 | 8 | 0 | 8 | 0% |
| 🏳️ Gary Schultz | 1,328 | 8 | 0 | 8 | 0% |
| 🇺🇸 Ryan EllisHigher-rated, 1× champion | 3,940 | 3 | 1 | 2 | 33% |
| 🏳️ Tim WeaverHigher-rated | 1,989 | 2 | 1 | 1 | 50% |
| 🏳️ Brian CatesHigher-rated | 1,938 | 2 | 1 | 1 | 50% |
| # | Driver | Series | Rating |
|---|---|---|---|
| 36,493 | 🏳️ Ron Farmer | NASA | 767 |
| 36,494 | 🏳️ Ted Kokis | NASA | 767 |
| 36,495 | 🏳️ Tomas LaCosta | Sports 2000 North America | 767 |
| 36,496 | 🏳️ Wingate Clapper | PCA Club Racing | 767 |
| 36,497 | 🏳️ Chris Boutilier | SVRA | 766 |
| 36,498 | 🏳️ Christopher Howard | SCCA Regionals | 766 |
| 36,499 | 🏳️ Ellen Silverberg | SCCA Regionals | 766 |
| 36,500 | 🏳️ J. Ryals | NASA | 766 |
| 36,501 | 🏳️ Jack Porter | SCCA Regionals | 766 |
| 36,502 | 🏳️ James P Doolin | PCA Club Racing | 766 |
| 36,503 | 🏳️ Jeffrey Diffenderfer | NASA | 766 |
| 36,504 | 🏳️ Jim Bryant | SCCA Regionals | 766 |
| 36,505 | 🏳️ Joan Linehan | SCCA Regionals | 766 |
| 36,506 | 🏳️ John McGee | SCCA Regionals | 766 |
| 36,507 | 🇬🇧 John Russell | NASA | 766 |
| 36,508 | 🏳️ Kevin Patterson | SCCA Majors | 766 |
| 36,509 | 🏳️ M. Gray | NASA | 766 |
| 36,510 | 🏳️ Mario Costantini | SCCA Regionals | 766 |
| 36,511 | 🏳️ Mark Hutchins | SCCA Majors | 766 |
| 36,512 | 🏳️ Reginald Dodd | NASA | 766 |
| 36,513 | 🏳️ Robert Kozinski | SCCA Regionals | 766 |
Jeffrey Diffenderfer is a racing driver who last raced in NASA for Mazda Miata. Diffenderfer has recorded 0 wins and 0 podiums from 21 starts.[1]
A Racer Rating of 766 ranks Diffenderfer 36503th of 40,200 indexed drivers, on an Elo scale where the strongest reach the high 8,000s. It is built from every indexed race in the driver's file, decayed for time since their last race.