In 2005, Hamilton started courting sponsors and perusing the paddock in an effort to return to racing. After settling several personal and business issues, he landed a ride for the 2007 Indianapolis 500, driving for Vision Racing. Qualifying 20th, Hamilton placed 9th after the race was ended early on lap 166 due to rain. For 2008, Hamilton re-signed with Vision Racing. He finished 14th in the 2008 Indianapolis 500. For the 2009 season, he drove for Dreyer & Reinbold Racing, and was the only one of the team's four drivers to qualify during the first weekend of qualifications. However he crashed out of the race on lap 79.