Mark-Paul Harry Gosselaar (pronounced GOS-ler; born March 1, 1974) is an American actor. He is best known for his television roles as Zack Morris in NBC's Saved by the Bell, Disney's Good Morning, Miss Bliss, and Saved by the Bell: The College Years; Detective John Clark in ABC's NYPD Blue; Jerry Kellerman in TNT's Raising the Bar; and Peter Bash in the TNT's Franklin & Bash.