Roger Penske and Chip Ganassi saw their cars lead the opening IMSA WeatherTech SportsCar Championship practice for the Mobil 1 Twelve Hours of Sebring.ResultsHelio Castroneves was fastest with a 1m48.237s lap in the No. 6 Penske Racing Acura DPi. He was followed by Tristan Vautier in the No. 90 Spirit...

A right rear puncture on the No.10 Konica Minolta Cadillac – the third puncture to hit the team thus far – dropped Wayne Taylor Racing out of contention in the ninth hour of the Rolex 24.Hour 9 resultsWith pole-winner Ranger van der Zande at the wheel and running in third...