Question:  Enzo Amore and Big Cass was at one point managed by an American professional wrestler currently performing on what brand?

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Susumu Mochizuki: Susumu Mochizuki (望月享 , Mochizuki Susumu , born August 17, 1978) better known by his ring name Susumu Yokosuka (横須賀享 , Yokosuka Susumu ) , is a Japanese professional wrestler currently performing for the Dragon Gate professional wrestling promotion.  He is not related to fellow Dragon Gate wrestler and long term ally/rival Masaaki Mochizuki, who debuted much earlier for WAR.

Simon Gotch: Seth Lesser (born October 18, 1982) is an American professional wrestler currently performing under the ring name Simon Grimm.  He is best known for his time in WWE as Simon Gotch, where he held the NXT Tag Team Championship as one-half of The Vaudevillains along with Aiden English.

Bull Dempsey: James Smith (born January 16, 1988) is an American professional wrestler currently performing on the independent circuit under the ring name Bull James.  He is known for his time in the American professional wrestling promotion WWE, where he wrestled for the developmental territory WWE NXT under the ring name Bull Dempsey.

Carmella (wrestler): Leah Van Dale (born October 23, 1987) is an American professional wrestler, professional wrestling manager, dancer, and model, currently signed to WWE under the ring name Carmella, performing on the SmackDown brand.

Enzo and Cass: Enzo Amore and Big Cass (the latter of whom was formerly known as Colin Cassady), often shortened to Enzo and Cass, were a professional wrestling tag team.  In real life, Enzo and Cass met as teenagers, during a pick-up game of basketball at The Cage in Manhattan, New York, nearly ten years before reuniting on WWE's developmental branch NXT, in July 2013.  The team was at one point managed by Cass' real life girlfriend, Carmella.

Enzo Amore: Eric Arndt (born December 8, 1986) is an American professional wrestler currently signed to WWE where he performs on Raw brand in the cruiserweight division under the ring name Enzo Amore, and is the current Cruiserweight Champion in his first reign.

WWE Cruiserweight Championship: The WWE Cruiserweight Championship is a professional wrestling championship created and promoted by the American professional wrestling promotion WWE on the Raw brand.  It is defended on "Monday Night Raw" and the cruiserweight-exclusive "205 Live".  The current champion is Enzo Amore, who is in his first reign.

Johnny Palazzio: Jean Paul Whittacker, better known by his ring name Johnny Palazzio, (born 6 March 1980) is a South African professional wrestler currently performing for Africa Wrestling Alliance.  He is the current 2-time African Cruiserweight Champion and previously held the title for 4 years until he lost the title to William McQueen on 2 December 2008.

Big Cass: William Morrissey (born August 16, 1986) is an American professional wrestler currently signed to WWE, where he performs on the Raw brand under the ring name Big Cass, a modification of his previous ring name Colin Cassady.

Shawn Daivari: Dara Shawn Daivari (Persian: دارا داوری‎ ‎ ) (born April 30, 1984) is an American professional wrestler currently performing on the independent circuit as Shawn Daivari.  He is best known for his work with World Wrestling Entertainment (WWE) as Daivari and with Total Nonstop Action Wrestling (TNA) as Sheik Abdul Bashir.  He opened a wrestling school with Ken Anderson, brother Ariya Daivari, Molly Holly, and Arik Cannon in Minneapolis, Minnesota, called The Academy: School of Professional Wrestling.

Supporting paragraphs: Enzo and Cass Carmella (wrestler)
Answer: SmackDown