Most famous for playing Zack Morris in "Saved by the Bell," actor Mark-Paul Gosselaar is now donning the tools of ignorance for his newest role: that of an All-Star Padres catcher in the new FOX drama "Pitch." Watch the video above for MPG's thoughts on the new role, what makes "Saved by the Bell" timeless and why it's harder to gain weight than lose weight for a role.