Robert Anthony Fish is an American professional wrestler currently performing for Major League Wrestling (MLW). He is best known for his tenure with WWE, where he performed on the NXT brand and was a member of The Undisputed Era. In WWE, he is a former 2-time NXT Tag Team Champion alongside his tag team partner Kyle O'Reilly. He is also known for his time with All Elite Wrestling (AEW) from 2021 to 2022 and Ring of Honor (ROH) from 2013 to 2017, where he wrestled as one-half of the tag team reDRagon and held the ROH World Tag Team Championship three times and the ROH World Television Championship once. He is also known for his appearances in Japan both for Pro Wrestling Noah and for New Japan Pro-Wrestling, where he held the IWGP Junior Heavyweight Tag Team Championship twice.

The Undisputed Era was a professional wrestling stable from WWE's NXT brand. It formed on August 19, 2017, at NXT TakeOver: Brooklyn III shortly after Adam Cole, Bobby Fish, and Kyle O'Reilly signed with WWE, although Fish and O'Reilly had already been a tag team since 2012 under the name reDRagon. After, Fish suffered an injury in March 2018, April 7 at NXT TakeOver: New Orleans marked a turning point for the Undisputed Era: during the event, Cole became the inaugural NXT North American Champion, he and O'Reilly won the 2018 Dusty Rhodes Tag Team Classic, and Roderick Strong joined the stable at the end of a lengthy feud against it; both Cole and Strong were subsequently recognized as co-Tag Team Champions under the Freebird Rule. O'Reilly later had two more additional reigns as NXT Tag Team Champion, one with Strong and one with Fish, while Cole became NXT Champion at NXT TakeOver: XXV, becoming NXT's second Triple Crown winner. On September 18, Strong won the NXT North American Championship, making the Undisputed Era the first stable to simultaneously hold all the male titles on NXT. All four stayed champions until January 22, 2020, when Strong lost his title to Keith Lee.