 Schulz returned to coaching in 1913 as the line coach and chief assistant coach for Fielding H. Yost at Michigan. He held that position for three seasons from 1913 – 1915. While working as an assistant coach at Michigan, Schulz has been credited with introducing the technique of overshifting a lineman on defense. In 1913, Schulz developed a new blocking technique by shifting one of the linemen. Coach Yost was unconvinced until Schulz performed a demonstration using Michigan's left guard Royce Traphagen. Schulz first put Traphagen in the line position designated by Yost, Schulz lined up on the other side of the line and charged, "almost wrecking Traphagen". Then, Schulz had the groggy Traphagen line up in the spot designated by Schulz, and when Schulz charged he missed. Schulz implemented the overshift technique during the 1913 season.
