Philadelphia Union midfielders Freddy Adu and Amobi Okugo called to U.S. Olympic qualifying team

PORTLAND, Ore. - Philadelphia Union midfielders Freddy Adu and Amobi Okugo have made the final cut for the United States men's Olympic qualifying tournament team.

Adu and Okugo will head straight to Nashville, where the U.S. will play its group games, after Monday's season-opener against the Portland Timbers. They will miss the next three Union games: March 18 against Colorado, March 24 against Chicago and March 31 against Vancouver.

Lancaster, Pa., native and Montréal Impact defender Zarek Valentin also made the roster.

If the U.S. reaches the knockout stage, coach Caleb Porter's team will head to LIVESTRONG Sporting Park in Kansas City, Kansas. As with the U.S. women's tournament a few months ago, the semifinal winners will qualify for the Olympics in London.

There is one player yet to be named to the squad. It's been reported that Columbus Crew midfielder Dilly Duka was to be the 20th player, but he had to withdraw at the last minute due to a hamstring injury suffered this past Saturday.

Here are the 19 players whose selections were announced today:

Goalkeepers (2): Bill Hamid (D.C. United/MLS), Sean Johnson (Chicago Fire/MLS)

Defenders (6): Josh Gatt (Molde/Norway), Perry Kitchen (D.C. United/MLS), Ike Opara (San Jose Earthquakes/MLS), Kofi Sarkodie (Houston Dynamo/MLS), Zarek Valentin (Montréal Impact/MLS), Jorge Villafaña (Chivas USA/MLS)

Midfielders (6): Freddy Adu (Philadelphia Union; Potomac, Md.), Joe Corona (Club Tijuana//Mexico), Mix Diskerud (Gent/Belgium), Jared Jeffrey (Mainz/Germany), Amobi Okugo (Philadelphia Union/MLS), Michael Stephens (Los Angeles Galaxy/MLS)

Forwards (5): Juan Agudelo (New York Red Bulls/MLS), Terrence Boyd (Borussia Dortmund/Germany), Teal Bunbury (Sporting Kansas City/MLS), Joe Gyau (Hoffenheim/Germany), Brek Shea (FC Dallas/MLS)