- For his father, see Buck.
After Larry escapes from Dr. Mephesto's lab, he seeks out his wife, Leslie. When he meets her, he learns that she has a new life with another man and the couple have two kids together, Buck and Calvin.
Buck wears white shoes, green pants with a blue belt, a red shirt, and a yellow "BUFU" hooded jacket. He also wears a backwards Denver Broncos cap and has brown hair.
- "Prehistoric Ice Man" - Seen as Larry's ex-wife's kid with another man.