 Margarita played for the Chicago Bears from 1944 to 1946, leading the team in rushing in 1945.Following his playing career, he took the head coaching job at Georgetown University, compiling a 7–12 record in two seasons (1949–1950) and leading the Hoyas to the Sun Bowl in his first season.After a disappointing 2–7 record in his second season, the university decided to disband the football team, citing travel expenses and high rent at Griffith Stadium.