On 3 January 2007, Andretti Green Racing announced that Franchitti had re-signed for the IRL team for a tenth consecutive season in American Open Wheel racing. That year he also undertook a limited programme in the American Le Mans Series driving an Acura ARX-01, teaming up with his younger brother, Marino Franchitti and long-time AGR teammate Bryan Herta. On 27 May 2007, Franchitti won a rain-shortened Indianapolis 500, finishing under a yellow flag after an accident involving Dan Wheldon and Marco Andretti following lap 163. The race was halted due to rain three laps later. His prize money of $1.6m was equal to the entire purse for the 1982 race.