Acting · Belfast, Northern Ireland · Born February 20, 1985
Damian Mackle is an Irish professional wrestler. He is best known for his time in WWE, where he performed under the ring name Killian Dain and since his departure from WWE he has reverted back to his ring name on the independent circuit Big Damo. That ring name Big Damo is derived from his first ring name, Damian O'Connor. Prior to joining WWE, he won the ICW World Heavyweight Championship while wrestling for Insane Championship Wrestling. He also wrestled for numerous promotions on the British independent circuit, around Europe, and in the USA including All Elite Wrestling, Progress Wrestling, Revolution Pro Wrestling, Westside Xtreme Wrestling, Absolute Intense Wrestling, Beyond Wrestling, Premier British Wrestling, Scottish Wrestling Alliance, What Culture Pro Wrestling and IPW:UK. On 19 October 2016, WWE announced that Mackle had signed a developmental contract with the company and had arrived at the WWE Performance Center in Orlando, Florida. He began to work in the NXT brand as part of the stable Sanity, along with Nikki Cross, Eric Young and Alexander Wolfe. In 2018, Dain, Wolfe and Young were drafted to SmackDown, where they worked as a stable until the dissolution. Then, he was drafted again to NXT, where he stayed until his release, in June 2021.
MoviePROGRESS Chapter 193: PROGRESS Las Vegas II
2026
as Big Damo
TVWXM Ground Zero
2025
as Big Damo
MoviePROGRESS Chapter 152: For The Love Of PROGRESS
2023
as Big Damo
RevPro Revolution Rumble 2023
2023
as Big Damo
MoviePROGRESS Chapter 145: Wrestling Witch Face - Trick Or Treat
2022
as Big Damo
MovieRic Flair's Last Match: Preshow
2022
as Big Damo
MovieNJPW Music City Mayhem
2022
as Big Damo
MovieOspreay: The Rise of an International Pro Wrestler
2020
TVQuizzleMania
2020
as Big Damo
MovieNXT TakeOver: WarGames
2019
as Killian Dain
MovieWWE Best of NXT TakeOver 2018
2019
as Killian Dain
MovieWWE Extreme Rules 2018
2018
as Killian Dain
MovieNXT Takeover: New Orleans
2018
as Killian Dain
MovieNXT: Best of 2017
2018
MovieNXT TakeOver: WarGames
2017
as Killain Dain
MovieNXT TakeOver: Brooklyn III
2017
as Killian Dam
MovieWWE NXT Takeover: Chicago
2017
as Killian Dain
MovieWWE WrestleMania 33
2017
as Killian Dain (Preshow)
MovieNXT Takeover: Orlando
2017
as Killian Dane
MovieNXT Takeover: San Antonio
2017
as Killian Dain
MovieRevPro Uprising 2016
2016
as Big Damo
MovieRevPro: Angle Vs. Sabre Jr.
2016
as Big Damo
RPW: Sittingbourne Spectacular 2016
2016
as Big Damo
RPW: Epic Encounter 2016
2016
as Big Damo
MovieTNA One Night Only: Joker's Wild 4
2016
as Big Damo
PROGRESS Chapter 26: Unknown Pleasures
2016
as Damian O'Connor
MovieRevPro High Stakes 2016
2016
as Big Damo
ICW Fear & Loathing VIII
2015
as Big Damo
RevPro & NJPW: Global Wars UK
2015
as Damian O'Connor
MovieRevPro Uprising 2015
2015
as Big Damo
RevPro Summer Sizzler 2015
2015
as Damian O'Connor
RPW: At Our Best 2015
2015
as Damian O'Connor
TVICW Fight Club
2015
as Big Demo
MovieEVE Special Edition
2012
as Damian O'Connor
TVWWE NXT
2010
as Big Damo
TVWWE Friday Night SmackDown
1999
TVWWE Pay Per View
1985
