Option declined following 2016 season.
Missimo, 23, joins the Union from Northwestern University. He was the third overall selection in the fourth round of the SuperDraft after spending four years with the Wildcats.
COLLEGE: During his career at Northwestern, Missimo played 76 games and started 56, scoring seven goals and handing out 12 assists. In 2015, Missimo scored one goal and gave two assists and was named NSCAA Second Team All-Big Ten Conference for the second year in a row.