Clark began his career as a stand-up comedian. Clark was a feature on a 1995
HBO young comedians special hosted by
Garry Shandling along with
Dave Chappelle,
Dave Attell and
Louis C.K. Before landing a regular starring television role, Clark appeared in several small film roles In 1995 and 1996, he also had a recurring role on the sitcom
Ellen. His first starring role was in the short-lived television comedy series
Boston Common. In 2000, Clark landed the role of Greg Warner in the television comedy
Yes, Dear. For this role, he was nominated for a
Young Artist Award (along with co-star
Jean Louisa Kelly as the
Most Popular Mom & Dad in a Television Series) and a
Prism Award. Along with
Mike O'Malley, his
Yes, Dear co-star, he appears in
Alan Jackson's 2005 music video for "
The Talkin' Song Repair Blues". In March 2006,
CBS cancelled
Yes, Dear after 6 seasons, when Clark was hired to host
NBC's
Last Comic Standing. In 2011, opposite
Missi Pyle and
John Michael Higgins, Clark starred as Jack Schumacher in the comedy
My Uncle Rafael. ==Filmography==