William Morrissey is an American professional wrestler signed with Impact Wrestling. He is best known for his work with WWE as Big Cass and Impact as W.Morrissey.
In 2011, Morrissey signed with the company and began working at FCW. In 2012, Morrissey went to NXT under the ring name of Colin Cassady. In 2013, Cassady and Enzo Amore formed a villainous tag team. The team faced several high-profile tag teams in NXT, such as American Alpha, Blake and Murphy, The Vaudevillains, The Lucha Dragons, The Ascension, and The Revival. After Carmella, the team turned face. At NXT TakeOver London and Unstoppable, they lost to The Revival.
After WrestleMania 32, they debuted on RAW and cut a promo on The Dudley Boyz. At BattleGround, they teamed up with John Cena to face The Club and won. At SummerSlam, they lost to Chris Jericho and Kevin Owens. Cass and Amore spent the years chasing for the RAW Tag Team Championship but were unsuccessful. At WrestleMania 33, they were in a fatal four-way ladder match which was won by The Hardy Boyz.
In June, Corey Graves revealed Cass as the mystery attacker of Enzo Amore. The team split and Cass turned heel. Cass feuded with Enzo Amore and Big Show, where he defeated them frequently. At SummerSlam, Cass defeated Big Show. After SummerSlam, Cass got injured and took some time off. In 2018, Cass moved to SmackDown and began feuding with Daniel Bryan. Cass lost to Bryan at Backlash and Money in the Bank before being released in June.
After being released, Morrissey went back to the independent circuit where he spent two years of his career before joining WWE. Morrissey went under several name changes, such as Big Cazz, CaZXl, and Big Ca$$.
In April, Morrissey signed with Impact Wrestling and made his debut at Rebellion. At Against All Odds, he defeated Rich Swann. Morrissey formed an alliance with Moose. However, the alliance didn't last long, as Moose defeated him to win Call Your Shot at Bound for Glory. At Hard to Kill, Morrissey and Cardona lost to Moose in a triple threat match for the Impact Championship.