Herculez Gomez, ST—Gomez has helped Santos Laguna tremendously this season, as they made it to the CONCACAF Champions League Final and helped win the Mexico Clausura football title. He is certainly worthy of coming in and helping the U.S. attack this summer.
Brad Guzan, GK—The backup Aston Villa keeper has been the understudy of keepers such as Shay Given and Brad Friedel, but he has spent the majority of his time on the bench. While he'll be looking for offers for a professional club this summer, Guzan is a worthy backup for Tim Howard.
Edgar Castillo, DF—The former Mexican defender helped Santos Laguna win Mexico's top division in 2008 and has spent all of his career in Mexico. The 25-year-old was born in the United States and has been a member of the USMNT pool since 2009.
Kyle Beckerman, MF—It's impossible to not have a guy with that hairstyle on the squad. Besides the point, Beckerman has been an MLS All-Star for three consecutive seasons and helped the U.S. to a 1-1 draw with Mexico.
Michael Parkhurst, DF—The 2005 MLS Rookie of the Year has spent the past four seasons in Denmark. Parkhurst is a worthy defensive back.
Terrence Boyd, FW—Another half-German player, Boyd spent this past season playing for Borussia Dortmund's second team and scored 20 goals this term. Boyd was also a goal scorer in the USA U-23's loss to El Salvador this spring. Boyd could possibly play as a winger and fill in for Dempsey or Donovan.
Juan Agudelo, ST—Toss up between Agudelo and Chris Wondolowski. Wondolowski has won a Golden Boot in the MLS and has proven to be a dominant goal scorer for San Jose, but he has yet to score a single goal for the U.S. On the other hand, Agudelo is a 19-year-old who has spent the majority of his career on and off the bench of NYRB. He scored a goal against Argentina in 2010.
Fabian Johnson, MF—Another solid German-American playing for the USMNT. Johnson spent this past season playing for TSG 1899 Hoffenheim, a squad that finished 11th in the Bundesliga. Johnson is 24-years-old and spent his U-23/U-21 days playing for Germany.
Joe Corona, MF—Joe Corona is going to be a stud in the upcoming years for the United States. The kid scored a hat trick against Cuba's U-23 side and scored a goal against El Salvador in Olympic Qualifying. He'll be a name to keep an eye on over the next couple of years.
Alfredo Morales, DF—Morales was a defender for the relegated side, Hertha Berlin, in the Bundesliga this past season. Morales has also been linked to playing for Peru, as his father was born in the country. Alfredo can also move up and play as a defensive midfielder.
Nick Rimando, GK—Rimando is one of the top keepers in MLS. In 2009 he was the MLS Cup MVP. Rimando would also be a solid goalkeeper behind Tim Howard.
Danny Williams, MF—He is another German-American that Klinsman has snatched to be a member of the United States National Team. Williams will be another name to keep an eye on in upcoming seasons. Williams can play multiple positions in the midfield.