| | No |  |  |  |  |  |  | | | | | | | | 98 | AAR Racing
| P.J. Jones |  |  |  | Castrol, Degree | | 36 | | Alex Barron | | | | Castrol, Degree | | 25 | Arciero-Wells
| Max Papis | | |  | MCI | | 24 | | Hiro Matsushita (until Rio) | | | | Panasonic/Duskin | | | 24 | | Robby Gordon (after Rio) | | | | | | 16 | Bettenhausen
| Helio Castro Neves | |  | | Alumax | | 77 | Davis Racing
| Arnd Meier |  |  | | BAAN Software | | 10 | Della Penna
| Richie Hearn |  | | | Ralph's/Budweiser | | 42 | | Hideshi Matsuda (1 race) | | | | BMP Minijuke | | 99 | Forsythe
| Greg Moore | | | | Players | | 33 | | Patrick Carpentier | | | | Players | | 12 | Ganassi
| Jimmy Vasser | |  | | Target | | 1 | | Alex Zanardi | | | | Target | | 26 | Green
| Paul Tracy | | | | KOOL | | 27 | | Dario Franchitti | | | | KOOL | | 9 | Hogan
| JJ Lehto | | | | Hogan Motor Leasing | | 6 | Newman-Haas
| Michael Andretti | | | | Havoline/Kmart | | 11 | | Christian Fittipaldi | | | | Havoline/Kmart | | 17 | PacWest
| Mauricio Gugelmin | | | | Hollywood | | 18 | | Mark Blundell | | | | Motorola | | 20 | Patrick
| Scott Pruett | | | | Visteon Automotive | | 40 | | Adrian Fernandez | | | | Tecate/Quaker State | | 19 | Payton-Coyne
| Michel Jourdain, Jr. | | | | Herdez/Viva Mexico | | 34 | | Dennis Vitolo (15 races) | | | | SmithKline Beecham | | 34 | | Gualter Salles (4 races) | | | | | | 2 | Penske
| Al Unser. Jr |  | | | Marlboro | | 3 | | Andre Ribeiro | | | | Marlboro | | 15 | Project Indy
| Roberto Moreno | | | | Hawaiian Tropic | | 7 | Team Rahal
| Bobby Rahal | | | | Miller Lite | | 8 | | Bryan Herta | | | | Shell | | 21 | Tasman
| Tony Kanaan | | | | LCI | | 5 | Walker
| Gil de Ferran | | | | Valvoline/Cummins |
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