Won 2015 GTLM championship, winning four races (Canadian Tire, Road America, VIR and Road Atlanta) for Porsche North America
2016
Finished 8th in GTLM point standings after collecting a victory at Long Beach and an additional podium at COTA
2017
Co-drove to first victory for new mid-engined Porsche 911 RSR with Dirk Werner at Lime Rock Park. Also earned podium results at Daytona and Sebring en route to fifth in the final championship standings.
2018
Finished seventh in GTLM championship standings alongside co-driver Tandy. Won at Sebring and Michelin Raceway Road Atlanta with Tandy and Makowiecki.
