Luke James Uggles Eatwell, known by his ring name Zack Sabre Jr. and its abbreviated form ZSJ, is an English-born professional wrestler. He is signed to New Japan Pro-Wrestling (NJPW), where he is the current IWGP World Heavyweight Champion in his first reign. In NJPW, he is the second and current leader of the group The Mighty Don't Kneel (TMDK) and is a former two-time and inaugural NJPW World Television Champion. He also makes sporadic appearances for partner promotion All Elite Wrestling (AEW) and its sister promotion Ring of Honor (ROH).