Houston Dynamo

Standout defender Cameron back in Houston for Copa semifinal

Earlier this year, Geoff Cameron wasn't quite sure what his role on the U.S. national team would be.

Things are much different now. Cameron has paired with John Brooks to star in central defense and help the United States reach Tuesday's Copa America semifinal against Argentina.

"You could say it's changed," Cameron said with a chuckle on Monday. "I'm just trying to be a leader in the back and try to help the guys as best I can and just do my job and focus on my part, making sure that in the back four we're organized and collectively John and I are on the same page, and whoever is in the right back position or left back position we're all together as a...