The Grand Prix of Houston has been dropped from the IndyCar schedule for 2015. IndyCar ran a doubleheader race at the NRG Park track the past two years, but IndyCar president Mark Miles said Friday that scheduling conflicts prompted the change. Houston's departure from the schedule likely opens a June date for an IndyCar race in Toronto. The Grand Prix of Houston also was on the IndyCar schedule from 1998-01 and 2006-07. More...