Norm McDonald played Burt Reynolds (Richard Chubby) on Saturday Night Live in the skit "Celebrity Jeopardy". His performance as Little Chubby is nearly identical to his portrayal of Burt Reynolds on Saturday Night Live.
When Earl is recounting his history with Little Chubby, a Fine Young Cannibals song comes on the jukebox. Little Chubby puts on a motorcycle helmet and smashes the jukebox. This is nearly identical to a scene in the movie Hooper where the character Hooper does the same thing. Hooper was played by Burt Reynolds, Little Chubby is played by Norm MacDonald who in this role is impersonating Burt Reynolds.
Little Chubby is played by Norm MacDonald. Earlier in the season, Chubby himself was played by Burt Reynolds. Norm MacDonald used to do celebrity impressions of Reynolds on Saturday Night Live (1975).
In the flashback to when he kicked Little Chubby in the groin, Earl is wearing a black jumpsuit and an orange afro wig. This is a reference to an internet video where the same thing occurs.