Photo: CBS. He’s hosted “Survivor” for more than a decade. Mark-Paul Gosselaar is best-known for playing Zack Morris on “Saved by the Bell.” Photo: Now Jeff Probst is facing a new challenge: fatherhood, helping to raise the children of Mark-Paul Gosselaar – you know him as Zack Morris from “Saved by the Bell.”. Probst married Gosselar’s ex-wife, Lisa Ann Russell, in 2011. Russell and Gosselaar had been married for 14 years, and the couple had two children together.