Conversation so far:
What happened in the 2000's?
Peele regularly performed at Boom Chicago in Amsterdam and The Second City in Chicago.
What did he do on Mad Tv?
Peele performed celebrity impersonations.
Who did he impersonate?
Caroll Spinney (as the voice of Big Bird from Sesame Street), Ja Rule, James Brown, Flavor Flav, Justin Guarini, Montel Williams, Morgan Freeman and Forest Whitaker.

Question: Did he do anything else on Mad?
Self-contained rewrite: Other than celebrity impersonations, did Jordan Peele do anything else on Mad TV?