He made his coaching debut on September 28, 1918, against Case Tech in Cleveland, Ohio, and earned a 26–6 victory. Leonard Bahan, George Gipp, and Curly Lambeau were in the backfield. With Gipp, Rockne had an ideal handler of the forward pass. The 1919 team had Rockne handle the line and Gus Dorais handle the backfield. The team went undefeated and won the national championship. Gipp died at age 25 on December 14, 1920, just two weeks after Walter Camp elected him as Notre Dame's first All-American. Gipp likely contracted strep throat and pneumonia while giving punting lessons after his final game on November 20 against Northwestern. Since antibiotics were not available in the 1920s, treatment options for such infections were limited and they could be fatal even to young, healthy individuals. Rockne was speaking to Gipper on his hospital bed when he was purported to have delivered the famous, "Win one for the Gipper" line. John Mohardt led the 1921 Notre Dame team to a 10–1 record with 781 rushing yards, 995 passing yards, 12 rushing touchdowns, and nine passing touchdowns. Grantland Rice wrote that "Mohardt could throw the ball to within a foot or two of any given space" and noted that the 1921 Notre Dame team "was the first team we know of to build its attack around a forward passing game, rather than use a forward passing game as a mere aid to the running game.” Mohardt had both Eddie Anderson and Roger Kiley at end to receive his passes. The national champion 1924 team included the “Four Horsemen” backfield of Harry Stuhldreher, Don Miller, Jim Crowley, and Elmer Layden. The line was known as the “Seven Mules”. The Irish capped an undefeated, 10–0 season with a victory over Stanford in the Rose Bowl. The 1926 team beat Army and was led by Christie Flanagan. For all his success, Rockne also made what an Associated Press writer called “one of the greatest coaching blunders in history.” Instead of coaching his team against Carnegie Tech, Rockne traveled to Chicago for the Army–Navy Game to "write newspaper articles about it, as well as select an All-America football team.” Carnegie Tech used the coach's absence as motivation for a 19–0 win; the upset likely cost the Irish a chance for a national title. The 1928 team lost to national champion Georgia Tech. “I sat at Grant Field and saw