A hard worker who'll push for a starting central spot, Clark took a risk by moving from MLS to Eintracht Frankfurt in January, but he fought past injuries to earn playing time and a three-year contract extension. He sometimes lacks sharpness with his passes but can unleash a powerful long-range shot, as he did to score an important goal in a qualifier at Trinidad last year.
The U.S. captain can play at left back or in central defense and is a threat to score with his head on set pieces. A regular for Rennes in the French first division, Bocanegra is smart positionally but isn't speedy—an increased concern after his sports-hernia surgery on May 5. But he's fearless, willing to sacrifice his body and respected by his teammates for his quiet leadership.