Howard was hired on merit/talent and did not bring sponsorship to the team. The team was presented with a sponsorship opportunity with another driver and Howard was replaced in the No. 24 Roth Racing entry by John Andretti for the 2008 Indianapolis 500. This was originally announced as a one–race arrangement, meaning Howard would be back for the Milwaukee race. However, on 30 May, it was announced that Andretti would continue in the No. 24 car in the Milwaukee Mile and Texas Motor Speedway races. Andretti also drove in the next two races at the Iowa Speedway and Richmond International Raceway, but Howard returned to the car for the Watkins Glen International road course race. It would be Howard's last race with the team, as it contracted to a single car driven by team owner Marty Roth for the rest of the season.