Maggioli was drafted in the 11th round of the 1946 NFL draft by the Washington Redskins and ultimately played for the Buffalo Bills as a two-way player in 1948, his team winning the Eastern Division of the AAFL. He played defensive back for the Detroit Lions in 1949 and with the Baltimore Colts in 1950, intercepting eight passes in the final year of his pro football career.
He is a member of both the Indiana Football Hall of Fame and Mishawaka High School Athletic Hall of Fame.