Yingling began his professional career with the Dayton Veterans from 1907 to 1909 and the Toledo Mud Hens from 1910 to 1911. He married Florine Sausser in 1908 after she said she would marry him if he struck out the next hitter, which he did. His best season between Toledo and Dayton was 1910, finishing the year with a win–loss record of 22–9 in 287 innings pitched.
