The 2003 Western Union 100 was Round 1 of the 2003 IRL Infiniti Pro Series. The event was held at Homestead-Miami Speedway in Florida, United States on 2 March 2003. Mark Taylor was the race winner.
Western Union 100 Race Result
| Pos. | No. | Driver | Chassis | Engine | Tire | Laps | Laps Led | Status | Started | Points |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | Mark Taylor | Dallara | Infiniti | Firestone | 67 | 56 | Running | 2 | 52 |
| 2 | 36 | Thiago Medeiros | Dallara | Infiniti | Firestone | 67 | 0 | Running | 1 | 40 |
| 3 | 99 | Brandon Erwin | Dallara | Infiniti | Firestone | 67 | 0 | Running | 8 | 35 |
| 4 | 5 | Arie Luyendyk Jr. | Dallara | Infiniti | Firestone | 67 | 0 | Running | 3 | 32 |
| 5 | 33 | Jonathan Urlin | Dallara | Infiniti | Firestone | 67 | 0 | Running | 6 | 30 |
| 6 | 9 | Tom Wood | Dallara | Infiniti | Firestone | 67 | 0 | Running | 12 | 28 |
| 7 | 12 | Matt Beardsley | Dallara | Infiniti | Firestone | 67 | 0 | Running | 14 | 26 |
| 8 | 91 | Aaron Fike | Dallara | Infiniti | Firestone | 67 | 0 | Running | 4 | 24 |
| 9 | 3 | Marty Roth | Dallara | Infiniti | Firestone | 66 | 0 | Running | 11 | 22 |
| 10 | 8 | Ronnie Johncox | Dallara | Infiniti | Firestone | 66 | 0 | Running | 7 | 20 |
| 11 | 27 | Gary Peterson | Dallara | Infiniti | Firestone | 66 | 0 | Running | 10 | 19 |
| 12 | 92 | Cory Witherill | Dallara | Infiniti | Firestone | 61 | 0 | Running | 9 | 18 |
| DNF | 24 | Paul Dana | Dallara | Infiniti | Firestone | 48 | 0 | Gearbox | 13 | 17 |
| DNF | 20 | Jeff Simmons | Dallara | Infiniti | Firestone | 34 | 11 | Accident | 5 | 16 |
| DNF | 14 | Ed Carpenter | Dallara | Infiniti | Firestone | 9 | 0 | Brakes | 15 | 15 |
| DNS | 6 | Lloyd Mack | Dallara | Infiniti | Firestone | 0 | 0 | DNS | 0 | 14 |