Mark-Paul Harry Gosselaar (/ˈɡɒslər/; born March 1, 1974) is an American actor. He is known for his television roles as Zack Morris in Saved by the Bell, Detective John Clark Jr. in NYPD Blue, and Peter Bash in Franklin & Bash. He was the lead in the 1998 film Dead Man on Campus, and starred in the 2016 TV series Pitch. He was the lead actor in the 2019 TV series The Passage. Gosselaar currently plays Paul Johnson (Rainbow's father) in the ABC sitcom series Mixed-ish, the prequel series of Black-ish.