Haas, Ferrari. ROMAIN GROSJEAN. #15. Like his Haas teammate Kevin Magnussen, Romain Grosjean did not show much strength in the 2017 season. However, despite the fact that he finished just one spot ahead of his teammate in the drivers standings, he was able to rack up eight top 10 finishes and a best finish of 6th place. His first two seasons driving for Haas have not been spectacular, and the likelihood that that will change and his third season driving for the team is minimal.. No. 8