The 2003 Phoenix 100 was Round 2 of the 2003 IRL Infiniti Pro Series. The event was held at Phoenix Raceway in Arizona, United States on 22 March 2003. Mark Taylor was the race winner.
Phoenix 100 Race Result
| Pos. | No. | Driver | Chassis | Engine | Tire | Laps | Laps Led | Status | Started | Points |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | Mark Taylor | Dallara | Infiniti | Firestone | 100 | 100 | Running | 1 | 52 |
| 2 | 36 | Thiago Medeiros | Dallara | Infiniti | Firestone | 100 | 0 | Running | 8 | 40 |
| 3 | 91 | Tony Ave | Dallara | Infiniti | Firestone | 100 | 0 | Running | 4 | 35 |
| 4 | 99 | Brandon Erwin | Dallara | Infiniti | Firestone | 100 | 0 | Running | 2 | 32 |
| 5 | 20 | Jeff Simmons | Dallara | Infiniti | Firestone | 100 | 0 | Running | 5 | 30 |
| 6 | 24 | Paul Dana | Dallara | Infiniti | Firestone | 100 | 0 | Running | 7 | 28 |
| 7 | 33 | Jonathan Urlin | Dallara | Infiniti | Firestone | 100 | 0 | Running | 13 | 26 |
| 8 | 12 | Matt Beardsley | Dallara | Infiniti | Firestone | 100 | 0 | Running | 9 | 24 |
| 9 | 92 | Cory Witherill | Dallara | Infiniti | Firestone | 100 | 0 | Running | 6 | 22 |
| 10 | 5 | Arie Luyendyk Jr. | Dallara | Infiniti | Firestone | 99 | 0 | Running | 15 | 20 |
| DNF | 3 | Marty Roth | Dallara | Infiniti | Firestone | 90 | 0 | Accident | 11 | 19 |
| DNF | 8 | Ronnie Johncox | Dallara | Infiniti | Firestone | 65 | 0 | Handling | 14 | 18 |
| DNF | 14 | Ed Carpenter | Dallara | Infiniti | Firestone | 41 | 0 | Accident | 12 | 17 |
| DNF | 27 | Gary Peterson | Dallara | Infiniti | Firestone | 19 | 0 | Accident | 10 | 16 |
| DNF | 9 | Tom Wood | Dallara | Infiniti | Firestone | 1 | 0 | Accident | 3 | 15 |