| Teams for 2003 O'Reilly Auto Parts 300 |
|---|
| Car | Team | Driver | Mfg |
|---|---|---|---|
| 0 | JD Motorsports | Morgan Shepherd |  |
| 1 | James Finch | Jamie McMurray |  |
| 2 | Richard Childress | Ron Hornaday, Jr. | |
| 4 | Biagi DenBeste Racing | Mike Wallace | |
| 5 | Rick Hendrick | Brian Vickers | |
| 6 | Tommy Baldwin Jr. | Damon Lusk | |
| 7 | Evans Motorsports | Randy LaJoie | |
| 10 | Greg Pollex | Scott Riggs |  |
| 12 | FitzBradshaw Racing | Kerry Earnhardt | |
| 16 | Wayne Day | Larry Gunselman | |
| 17 | John Reiser | Matt Kenseth | |
| 18 | Joe Gibbs | Coy Gibbs | |
| 19 | Todd Braun | Chad Blount | |
| 20 | Joe Gibbs | Mike Bliss | |
| 21 | Richard Childress | Johnny Sauter | |
| 22 | Bost Motorsports | Regan Smith | |
| 23 | Bill Davis | Scott Wimmer | |
| 25 | Ed Rensi | Bobby Hamilton, Jr. | |
| 26 | Dave Carroll | Kevin Grubb | |
| 27 | Brewco Motorsports | Chase Montgomery |  |
| 30 | Dave Carroll | Steadman Marlin | |
| 33 | BACE Motorsports | Tony Raines | |
| 37 | Brewco Motorsports | David Green | |
| 38 | Akins Motorsports | Kasey Kahne | |
| 44 | GIC-Mixon Motorsports | Mike Harmon | |
| 46 | Bill Lewis | Ashton Lewis | |
| 48 | George Debidart | Shane Hmiel | |
| 52 | Jimmy Means | Donnie Neuenberger | |
| 54 | Team Bristol Motorsports | Hermie Sadler | |
| 57 | Greg Pollex | Jason Keller | |
| 59 | ST Motorsports | Stacy Compton | |
| 60 | Jack Roush | Stanton Barrett | |
| 73 | Daryl Spoerl | Jason Schuler | |
| 77 | Joseph Reilly | Bruce Bechtel | |
| 79 | John Aramendia | Joe Aramendia | |
| 82 | FitzBradshaw Racing | Jimmy Spencer | |
| 87 | Joe Nemechek | Joe Nemechek | |
| 88 | Joe Nemechek | David Reutimann | |
| 90 | Dave Carroll | Lance Norick | |
| 91 | Red Racing | Andy Belmont | |
| 92 | Herzog Jackson Motorsports | Todd Bodine | |
| 99 | Michael Waltrip | Michael Waltrip | |
