Dominik Óscar Gutiérrez (born April 5, 1997), better known by the ring name Dominik Mysterio, is an American professional wrestler. He is signed to WWE and also appears in it's sister promotion Lucha Libre AAA Worldwide, where he is a one-time AAA Mega Champion. Mysterio is also a two-time WWE Intercontinental Champion and two-time NXT North American Champion. He is the first wrestler to hold championships in WWE and AAA simultaneously. Gutiérrez is a third-generation professional wrestler, after his father Rey Mysterio and great-uncle Rey Misterio Sr. He has been around wrestling for the majority of his life, thanks to attending WWE events as a child to see his father. He had his first direct involvement when he was 8 years old in 2005, which was a storyline in which his father battled Eddie Guerrero over his legal custody. Dominik began his wrestling training in 2017 and made his in-ring debut at the 2020 SummerSlam in a street fight against Seth Rollins. He later formed a tag team with his father and won the SmackDown Tag Team Championship, making them the first parent-child team to win a championship in WWE. At the 2022 Clash at the Castle, Dominik famously turned on his father and Edge, aligning himself with The Judgement Day and earning the moniker "Dirty Dom".