The 2003 IRL IndyCar Series brought some of the biggest changes in its history. The league adopted the name IndyCar Series, after a settlement with CART prohibiting its use had expired. Several former CART teams brought their full operations to the IRL, most notably major squads Chip Ganassi Racing and Andretti Green Racing, as well as former CART engine manufacturers Toyota and Honda. Veteran Al Unser Jr. drove in 2003 for Kelley Racing for the second season. Al won a single race – Bombardier 500 at Texas Motor Speedway, and finished the season 6th with 374 points. 2003 was his final full year in Indy car racing. Unser took part in few events next season and started at Indy-500 in 2006 and 2007. He won total of 34 races in his Indy car career – 31 races in CART and 3 in IRL.
|Al Unser Jr.||31||Kelley Racing|
|GL-104 No. 71642|