Question: 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?
Context: George Frank Ceithaml ( ; February 10, 1921 – May 24, 2012) was an American football quarterback and coach.  He was the starting quarterback for Fritz Crisler's University of Michigan football teams in 1941 and 1942.  Crisler later called Ceithaml "the smartest player he ever taught."  Ceithaml was selected as the quarterback on the 1942 All-Big Ten Conference team, the captain of the 1942 All-American Blocking Team, and was the 19th player selected in the 1943 NFL Draft.  He later served as an assistant football coach at Michigan and the University of Southern California. Paul Grover White (November 13, 1921 – June 3, 1974) was an American football player and coach.  He played college football as a halfback for Fritz Crisler's University of Michigan Wolverines football teams in 1941, 1942, 1943, and 1946 — missing the 1944 and 1945 seasons due to military service.  He served as the captain of the 1943 Michigan team that compiled a record of 8–1 (6–0 Big Ten) and finished the season ranked No. 3 in the AP Poll.  In 1944, he received Michigan's Big Ten Medal of Honor as the who had best demonstrated proficiency in scholarship and athletics.  He also played professional football for the Pittsburgh Steelers in 1947.  He played in 11 games for the Steelers, gaining 240 all-purpose yards and scoring one touchdown.  His longest run in the NFL was good for a 52-yard gain.  In 1949, he served as the backfield coach at Hillsdale College.  In March 1950, he was hired as the backfield coach at the University of Connecticut. Paul Stagg (March 18, 1909 – September 4, 1992) was an American football player, coach, and college athletics administrator.  He served as the head football coach at Moravian College (1934–1936), Springfield College (1937–1940), Worcester Polytechnic Institute (1941–1946), and Pacific University in Forest Grove, Oregon (1946–1960), compiling a career college football record of 94–99–12.  Stagg played football as a quarterback at the University of Chicago, where his father, Amos Alonzo Stagg, was the head coach.  He was an assistant coach under his father at Chicago in the fall of 1932 before graduating in December with a Bachelor of Science, majoring in geography.  He followed the elder Stagg in 1933 to the University of the Pacific in Stockton, California, where he served as an assistant coach for a season before taking the head coaching job at Moravian.  Paul Stagg returned to the University of the Pacific in 1961 as director of physical education and intercollegiate athletics, a capacity in which he served until 1967. Frederick Winslow "Fritz" Faurot, Jr. (March 18, 1909 – December 12, 2000) was an American football player and coach.  Starting as coach in 1933 at Excelsior Springs, MO, high school; moved to Chillicothe, MO in 1934-35.  He then served as the head football coach at Northeast Missouri State Teachers College—commonly known at the time as Kirksville State Teachers College and now known as Truman State University—from 1935 to 1937, at Parsons College from 1938 to 1941, at Central Methodist College in 1945 as basketball coach, 1946 as Director of Athletics and football coach, and at Murray State University from 1948 to 1955, compiling a career college football coach record of 73–49–9.  Faurot played college football at the University of Missouri, lettering in 1930 and 1932.  He served as a lieutenant commander in the United States Navy, as an instructor in the physical training program, during World War II.  He was the brother of College Football Hall of Fame coach, Don Faurot. Herbert Orin "Fritz" Crisler (January 12, 1899 – August 19, 1982) 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.  Crisler developed two-platoon football while serving as head coach at the University of Michigan from 1938 to 1947.  He also coached at the University of Minnesota (1930–1931) and Princeton University (1932–1937).  Before coaching, he played football at the University of Chicago under Amos Alonzo Stagg, who nicknamed him Fritz after violinist Fritz Kreisler. Friedrich "Fritz" Kreisler (February2, 1875January29, 1962) was an Austrian-born violinist and composer.  One of the most noted violin masters of his day, and regarded as one of the greatest violin masters of all time, he was known for his sweet tone and expressive phrasing.  Like many great violinists of his generation, he produced a characteristic sound which was immediately recognizable as his own.  Although it derived in many respects from the Franco-Belgian school, his style is nonetheless reminiscent of the "gemütlich" (cozy) lifestyle of pre-war Vienna. Earl Thomas Martineau (August 30, 1896 – January 20, 1966) was an American football player and coach.  He played halfback at the University of Minnesota and was selected as an All-American in 1922 and 1923 and served as the captain of the 1923 Minnesota team.  After graduating from Minnesota, Martineau became a football coach.  From 1924 to 1928, he was the head football coach at Western Michigan University, then known as Western State Normal School and Western State Teachers College, compiling a record of 26–10–2 in five seasons.  His 1926 team tallied a record of 7–1.  Martineau later served as a backfield coach for Purdue.  In 1932, Martineau began a long association with Fritz Crisler.  He was the backfield coach for Crisler at Princeton University from 1932 to 1937 and an assistant coach under Crisler at the University of Michigan from 1938 to 1945. Ralph C. Fritz (November 23, 1917 – February 4, 2002) was an American football player and coach.  A native of New Kensington, Pennsylvania, Fritz attended Kiski Preparatory School before enrolling at the University of Michigan.  He played guard for the Michigan Wolverines football team from 1939 to 1940.  In 1940, he was chosen by conference coaches as a first-team player on the Associated Press All-Big Ten Conference team.  Fritz later played professional football for the Philadelphia Eagles in 1941.  Fritz was one of the more than 1,000 NFL personnel who served in the military during World War II.  Starting in 1949, Fritz worked as a high school football coach in Wauchula, Florida.  In 1954, Fritz was hired as the athletic director and football coach at Lake Wales High School in Lake Wales, Florida.  Fritz died in 2002 at age 84 while living in Miami, Florida. Willie Fritz (born April 2, 1960) is an American football coach and former player.  He is the current head coach at Tulane University.  From 2014 to 2015, he was head coach at Georgia Southern University.  From 2010 to 2013, he was the head football coach at Sam Houston State University.  From 1997 to 2009, Fritz served as the head football coach at the University of Central Missouri.  From 1993 to 1996, he was the head football coach at Blinn College, a junior college in Brenham, Texas. Crisler Center (formerly known as Crisler Arena) is an indoor arena located in Ann Arbor, Michigan.  It is the home arena for the University of Michigan's men's and women's basketball teams as well as its women's gymnastics team.  Constructed in 1967, the arena seats 12,707 spectators.  It is named for Herbert O. "Fritz" Crisler, head football coach at Michigan from 1938 to 1947 and athletic director thereafter until his retirement in 1968.  Crisler Center was designed by Dan Dworsky, a member of the 1948 Rose Bowl team.  Among other structures that he has designed is the Federal Reserve Bank of Los Angeles.
Answer: Amos Alonzo Stagg