George (Potsy) Clark joined the NFL as a coach for the Spartans for the 1931 season. Clark had originally made a name coaching in the US Army during World War I. In the spring of 1919, he led the 89th Division's football team to the American Expeditionary Forces Championship. With the peace he took up coaching at the college-level, first at Illinois University (1919), then at Michigan State University (1920), The University of Kansas (1921-1925), Minnesota (1926), and, lastly, at Butler University in Indianapolis (1927-1929). At Portsmouth, Clark led an impressive line-up of recent college stars. All-American Quarterback Dutch Clark (Colorado College), Halfback Father Lumpkin (Georgia Tech) and Halfback Glenn Presnell (University of Nebraska), were the standout starters. Potsy Clark put together the Spartan roster of 1932, trimming it to seventeen men, allowing his team only six substitutes. It was Clark who proclaimed at the start of the famous Iron Man Game: “I am going to start eleven men and the only way you're going to come off that field is if we have to carry you off.”