began 2007 by making his continental debut in the 2007 CONCACAF Champions' Cup, appearing in three of Houston's four games against Puntarenas and Pachuca. He then missed more than a month of the 2007 season on national team duty, appearing in the 2007 CONCACAF Gold Cup and 2007 Copa América. His play through the first half of the season, including a goal against FC Dallas on June 3, earned him a spot in the 2007 MLS All-Star Game, the second consecutive season that Clark had been selected as an all-star. Following his return from the United States squad, he scored for the second time on the season on September 16, in a 3–1 victory over LA Galaxy. However, Clark's season ended at the end of September. He missed the final two regular season and all playoff matches due to a suspension resulting from a deliberate kick aimed at a prone Carlos Ruiz in a match with FC Dallas on September 30. Clark was sent off, received a nine-game suspension, and was fined $10,000, the most severe punishment in MLS history. In his absence, Houston went on to win MLS Cup 2007, repeating as MLS Cup champions. Clark finished the season with 23 appearances and two goals across all competitions. Clark's suspension carried over for the first two games of the 2008 season, but he jumped immediately back into the Houston lineup afterwards. He notched two goals in 25 appearances in MLS play, scoring against Chicago Fire on May 17 and Real Salt Lake on August 16. Clark also played a large role in Houston's continental competitions, playing 16 times and scoring once across the three competitions. He played every minute of the Dynamo's four matches in the CONCACAF Champions' Cup, repeated the feat across five games in the North American SuperLiga, and played in seven games of Houston's 2008–09 CONCACAF Champions League campaign. In the group stage of the SuperLiga, Clark scored his first career goal in a continental competition, coming in a 3–1 victory over D.C. United. He also converted during the penalty shootout in the final of that competition against New England, although the Revolution took the title by a 6–5 mark. Clark made a career-high 43 appearances in all competitions in 2008, scoring three times. Clark missed time during the summer of 2009, earning a call up to the United States for the 2009 FIFA Confederations Cup.