Kamara was born in Sierra Leone but left when civil war engulfed the African state and emigrated to the United States, before settling in Los Angeles. He joined Columbus Crew from Orange County Blue Star in 2006 and had brief spells with rival US teams San Jose Earthquakes and Houston Dynamo before arriving at Sporting Kansas City in 2009.
French striker Thierry Henry of the New York Red Bulls was suspended by Major League Soccer for one match on Friday for a headbutting incident in the 93rd minute of a match two days earlier.