It wasn't by choice. His character Dr. Pfieffer was replaced by David Ackroyd's character Dr. Boyer.
It appears to me to be character actor Jay O. Sanders. Not sure, but that is my guess.
DAYLIGHT
Daylight
Jay O. Sanders played Norbert "Ziggy" Walsh on the "Roseanne":http://en.wikipedia.org/wiki/Jay_O._Sanders
I believe the name of the actor is Jay O Sanders, a great character actor that has played different characters in movies and television...one to remember was Ziggy, from the Roseanne show, he was also in a movie called The Matchmaker, as a congressman!
Jaz-o is an old friend of Jay-z's who is very disappointed that he isn't as successful as Jay. Since they were friends at the beginning of Jay-z's career, Jaz-o feels that Jay should have helped me out instead of turning his back on him as Jay-z gained more notoriety. However as Jay would say, "Grown men, want me to sit 'em on my lap But I don't have a beard and Santa Claus ain't Black."
jay pea is saying:- take all of the o 's out of Jay Pea says to make the correct words
A word meaning to leave out which begins with an "o" is omit.
Jaz-O
Ticket o' Leave - 1922 is rated/received certificates of: UK:A
Brooklyn, NY with Jay-O and after Reasonable Doubt he gained a large following in the Hip Hop Community.
19,000 pounds a night ; 4 hours max. i hired him for my 16th in sheffield.