Herbert Orin "Fritz" Crisler, was an American college football coach who is best known as "the father of two-platoon football," an innovation in which separate units of players were used for offense and defense, before coaching, he played football at the University of Chicago under who, who nicknamed him Fritz after violinist Fritz Kreisler?
Fritz Crisler:  Before coaching, he played football at the University of Chicago under Amos Alonzo Stagg, who nicknamed him Fritz after violinist Fritz Kreisler. Fritz Kreisler: Friedrich "Fritz" Kreisler (February2, 1875January29, 1962) was an Austrian-born violinist and composer.
Amos Alonzo Stagg