For , Sauber start the beginning of a ten year sponsorship deal with energy drink giant Red Bull. Dietrich Mateschitz had purchased a majority share in the team. Fritz Kaiser joined the team as the commercial director. The Sauber C14 used a factory supply of Ford-Cosworth. The 1995 season saw the return of Karl Wendlinger and Heinz Harald Frentzen as the drivers. Wendlinger's accident in 1994 seemed to have reduced his driving potential and he was replaced rookie Jean-Christophe Boullion.