After completing his preparatory education, Macklin enrolled at the University of Pennsylvania. Macklin grew to be a giant of a man for his time. He was 6 feet, 7 inches tall and weighed 275 pounds. When Macklin arrived at Penn, one account indicates there were no uniforms large enough to fit him: "When the big husky appeared on the gridiron the first thing the coaches did was to send for the athletic outfitter, for there was not a suit on the campus that would encompass his frame." Macklin played two years at the tackle position for Penn's football team. The Chicago Daily Tribune later wrote: "For a big man he was remarkably agile and his tackling on the wings and his quickness in getting through to break up plays was the delight of the coaches."
Coaching career
In 1910, Macklin coached football at a boys' school at Pawling, New York. Macklin's success at Pawling brought him to the attention of Michigan Agricultural College, which was in need of a new athletic director and coach. He was hired in January 1911 upon the recommendation of the renowned Penn athletic trainer Mike Murphy. Macklin was the head coach at Michigan State 1911 to 1915 and compiled a record of 29–5. His winning percentage of.853 is the highest in the history of the Michigan State Spartans football program. Macklin's 1913 Michigan State team finished with an undefeated, untied record of 7–0 and outscored opponents by a combined score of 180 to 28. Macklin was the first Michigan State coach to lead the Spartans to football victories over Ohio State, Michigan, Wisconsin, and Penn State. Macklin's 1913 team was also the first racially integrated team in the school's history, as Gideon Smith became the first African-American player for the Spartans. Macklin was also the athletic director and coach of the baseball, men's basketball, and track and field teams. He coached the basketball team from 1910 to 1916 and compiled a 48–38 record, including a 12–3 record for 1911–12 season. He coached the baseball team from 1911 to 1915, compiling a record of 52–27. Macklin retired from coaching in March 1916 to enter the coal mining business in Pennsylvania.
Later years and honors
The Associated Press in 1949 called Macklin "the founding father of the big time at Michigan State College." When he was hired in 1911, the school was putting on games for $200. When he left, the school received guarantees of $10,000 for games. As athletic director, he also led the effort to build new athletic buildings and a modern gymnasium. In 1935, Michigan State renamed its football stadiumMacklin Field in his honor. At the time, Macklin was a coal mine operator living in Philadelphia, Pennsylvania. The name was changed to Macklin Stadium in 1948, and in 1957, Macklin's name was dropped and replaced by the current name, Spartan Stadium. Macklin died at his home in the suburbs of Philadelphia at age 65.
