3. Doug Polen – 2 Titles, 26 Race Wins

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This list’s last two-time WSBK Champion and the last American, Doug Polen brought Ducati its second and third champion titles in 1991 and 1992 aboard the Ducati 888 (Frenchman Raymond Roche was Ducati’s first WSBK champion aboard the 851). Polen returned to AMA racing in 1993 and handily won the Superbike title again aboard a Ducati. Polen also won two World Endurance Championships in 1997 and 1998.