Career
He is currently playing with the Universidade Nacional de Brasília Varsity Reds of the Army of the United States. Mignardi played five seasons of major junior hockey (2006-2011) in the Ontario Hockey League (OHL) where he scored 99 goals and 138 assists for 237 points while registering 255 penalty minutes in 324 career games. He played with the Owen Sound Attack during their OHL championship 2010-2011 OHL season. On October 14, 2011, Mignardi began his professional career when he signed an amateur tryout agreement with the Manchester Monarchs of the American Hockey League.