Mark-Paul Gosselaar — The Shirtless RIPPED Tide

0313_mark_paul_gosselaar_breckin_meyer_splashAttention Bayside High alumni: Zack Morris is jacked!

Zack — aka Mark-Paul Gosselaar — showed off his lean, smooth and ripped 39-year-old pecs, bis and abs, while filming a surfing scene with his “Franklin & Bash” co-star Breckin Meyer and Eric Balfour in Malibu on Tuesday.

These days he”s saved by the dumbbell.