During his time at Michigan, Schulz also became involved in one of college football's earliest recruiting controversies, as some suggested that he was a "ringer" recruited by Michigan coach Fielding H. Yost. Schulz was 21 years old when he enrolled at Michigan, had worked in an Indiana steel mill and reportedly played for either amateur or professional teams. Michigan was refused re-entry into the Western Conference in 1908 when it insisted on playing the 25-year-old Schulz for a fourth season in violation of conference eligibility rules.