( CNN ) -- Three-time Indianapolis 500 winner Dario Franchitti was released from a Houston hospital on Thursday , days after he was injured in a serious crash . Thirteen spectators were also hurt during IndyCar 's Grand Prix of Houston on Sunday . Franchitti , who was at Memorial Hermann-Texas Medical Center , will travel to Indianapolis , where he will be evaluated and await a second surgery to his right ankle . `` I 'm overwhelmed by the outpouring of support and I 'm thankful to have such a great family and such wonderful friends and fans . Thanks to everyone at the hospital and the track who took such good care of me during my stay in Houston , '' Franchitti said in a statement . The wreck occurred in the last lap of the race , when Japanese driver Takuma Sato bumped Franchitti 's car , sending it airborne into the protective fencing . The car spun multiple times against the fence , sending shards of debris flying toward the grandstands and shearing off part of its side . Franchitti , 40 , suffered a concussion in the wreck and fractures to his spine and ankle . The Scotland native won IndyCar racing 's top prize in 2012 , 2010 and 2007 . He was married to actress Ashley Judd for more than 11 years , but the couple announced in January that they were ending their marriage .
The two - time Indianapolis 500 winner thanks his friends , family and fans . Franchitti was involved in a serious crash on Sunday . He suffered a concussion and fractures to his spine and ankle .