Best ever is 12-0, Tom Zachary, 1929. Top 4 List:WINNING PERCENTAGE YEAR PCT W L T1 Dennis Lamp 1985 1.000 11 0 T1 Tom Zachary 1929 1.000 12 0 T1 Aaron Small 2005 1.000 10 0 T1 Howie Krist 1941 1.000 10 0