During the Chargers' 2008 minicamps, he practiced as a right tackle. He signed a four-year contract with the team on June 30, 2008. According to the Chargers, he will "most likely battle for a reserve role along the offensive line".[2]
Clark remained on the active roster for the first nine games of the 2008 season, but was cut on November 14 to make room for safetyTra Battle.[3] He was then re-signed to the team's practice squad on November 18.[4] The following day, he was re-signed to the active roster when wide receiverBuster Davis was placed on injured reserve.[5] He was not active for any of the games during the 2008 season.[6]
Clark was waived on December 1, 2009 and was re-signed to the practice squad on December 5.
After his contract expired at season's end, Clark signed a future contract with the Chargers on January 22, 2010. However, on August 9, 2010, he retired from football to focus more on his family.