William Morrissey is an American professional wrestler signed to All Elite Wrestling, where he performs under the ring name W. Morrissey.

He is primarily remembered for his stints between 2013 and 2018 in WWE, where he performed under the ring name Big Cass.

In his youth he attended Archbishop High School in Briarwood; he then received a scholarship to attend New York University, where he studied business and played center for the New York Violets from 2005 to 2009, becoming co-captain in his final season.

From September 2014 to December 2017 he was engaged to his colleague Carmella.