2005 Roger Penske Indy Racing League IndyCar Series statistics
| Race # | Track | Driver | Start | Finish | Car # | Sponsor | Chassis | Engine | Tire | Qualifying Speed | Laps | X Led | Laps Led | Status | Money | Points |
| 1 | Homestead | Sam Hornish, Jr. | 8 | 2 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 212.887 | 200 | 1 | 2 | running | 83650 | 40 |
| 1 | Homestead | Hélio Castroneves | 7 | 5 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 213.313 | 200 | 2 | 9 | running | 51600 | 30 |
| 2 | Phoenix | Sam Hornish, Jr. | 6 | 1 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 175.772 | 200 | 3 | 25 | running | 101400 | 50 |
| 2 | Phoenix | Hélio Castroneves | 3 | 2 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 176.081 | 200 | 3 | 49 | running | 93650 | 40 |
| 3 | St. Petersburg | Sam Hornish, Jr. | 6 | 15 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 102.125 | 85 | 0 | 0 | accident | 36900 | 15 |
| 3 | St. Petersburg | Hélio Castroneves | 2 | 20 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 103.360 | 12 | 0 | 0 | accident | 31900 | 12 |
| 4 | Motegi | Sam Hornish, Jr. | 1 | 7 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 204.740 | 199 | 1 | 14 | running | 75800 | 26 |
| 4 | Motegi | Hélio Castroneves | 4 | 11 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 204.447 | 198 | 0 | 0 | accident | 60500 | 19 |
| 5 | Indianapolis | Hélio Castroneves | 5 | 9 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 226.927 | 200 | 0 | 0 | running | 277805 | 22 |
| 5 | Indianapolis | Sam Hornish, Jr. | 2 | 23 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 227.273 | 146 | 6 | 77 | accident | 391455 | 15 |
| 6 | Texas | Sam Hornish, Jr. | 4 | 2 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 212.049 | 200 | 2 | 3 | running | 83650 | 40 |
| 6 | Texas | Hélio Castroneves | 10 | 5 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 211.702 | 200 | 1 | 7 | running | 51600 | 30 |
| 7 | Richmond | Hélio Castroneves | 2 | 1 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 175.797 | 250 | 2 | 112 | running | 101400 | 53 |
| 7 | Richmond | Sam Hornish, Jr. | 1 | 18 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 176.244 | 164 | 1 | 42 | accident | 43600 | 12 |
| 8 | Kansas | Hélio Castroneves | 14 | 8 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 212.507 | 200 | 0 | 0 | running | 43300 | 24 |
| 8 | Kansas | Sam Hornish, Jr. | 10 | 12 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 213.116 | 200 | 0 | 0 | running | 39600 | 18 |
| 9 | Nashville (IRL) | Sam Hornish, Jr. | 13 | 2 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | | 200 | 0 | 0 | running | 80150 | 40 |
| 9 | Nashville (IRL) | Hélio Castroneves | 15 | 5 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | | 200 | 0 | 0 | running | 49900 | 30 |
| 10 | Milwaukee | Sam Hornish, Jr. | 1 | 1 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 170.296 | 225 | 3 | 123 | running | 111400 | 53 |
| 10 | Milwaukee | Hélio Castroneves | 2 | 16 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 170.219 | 206 | 0 | 0 | running | 34900 | 14 |
| 11 | Michigan | Sam Hornish, Jr. | 13 | 5 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 217.373 | 200 | 1 | 6 | running | 49900 | 30 |
| 11 | Michigan | Hélio Castroneves | 16 | 21 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 216.846 | 138 | 0 | 0 | mechanical | 30600 | 12 |
| 12 | Kentucky | Hélio Castroneves | 15 | 5 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | | 200 | 0 | 0 | running | 49900 | 30 |
| 12 | Kentucky | Sam Hornish, Jr. | 3 | 7 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | | 200 | 0 | 0 | running | 43000 | 26 |
| 13 | Pikes Peak | Sam Hornish, Jr. | 2 | 2 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 175.404 | 225 | 2 | 71 | running | 83650 | 43 |
| 13 | Pikes Peak | Hélio Castroneves | 1 | 4 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 175.423 | 224 | 2 | 19 | running | 66500 | 32 |
| 14 | Sonoma | Sam Hornish, Jr. | 5 | 17 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 106.669 | 56 | 0 | 0 | running | 34400 | 13 |
| 14 | Sonoma | Hélio Castroneves | 2 | 21 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 107.664 | 19 | 0 | 0 | accident | 31900 | 12 |
| 15 | Chicagoland | Hélio Castroneves | 11 | 2 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 214.982 | 200 | 2 | 11 | running | 80150 | 40 |
| 15 | Chicagoland | Sam Hornish, Jr. | 4 | 3 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 215.717 | 200 | 0 | 0 | running | 67150 | 35 |
| 16 | Watkins Glen | Sam Hornish, Jr. | 11 | 7 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 129.961 | 60 | 1 | 3 | running | 47200 | 26 |
| 16 | Watkins Glen | Hélio Castroneves | 1 | 12 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 133.806 | 59 | 2 | 23 | running | 51900 | 18 |
| 17 | Fontana | Sam Hornish, Jr. | 3 | 5 | 6 | Marlboro Team Penske | Dallara | Toyota | Firestone | 218.602 | 200 | 1 | 1 | running | 51600 | 30 |
| 17 | Fontana | Hélio Castroneves | 6 | 9 | 3 | Marlboro Team Penske | Dallara | Toyota | Firestone | 217.765 | 200 | 0 | 0 | running | 43300 | 22 |
