2012: Joseph featured in ten games during the 2012 regular season, making four starts for Sporting Kansas City. Joseph earned the game-winning assist in Sporting KC’s 2-0 win over the Columbus Crew on July 14, 2012. More recently, Peterson Joseph started and played 66 minutes in Sporting KC’s 2-1 victory over the Philadelphia Union, marking his first start since a 2-1 loss to the Houston Dynamo on July 18 when he was ejected for a hard foul in the 47th minute. Joseph played 90 minutes in both international friendlies this season against Montpellier Herault SC and Stoke City FC. Joseph also started the first three Lamar Hunt U.S. Open Cup matches for Sporting Kansas City during the 2012 season, including playing 90 minutes in the quarterfinals to help Sporting KC earn a 3-0 victory over the Dayton Dutch Lions. Arguably Joseph's best performance of 2012 came in the Second Leg of the Eastern Conference Semifinals when he started and played the full 90 minutes against the Houston Dynamo at Sporting Park on November 7.
2011: Signed by Sporting Kansas City on September 1st after training with the club during the summer. Appeared in two MLS Reserve League matches, as well as Sporting Kansas City's international friendly against Newcastle United FC at Sporting Park.
2011: Loaned to SC Braga's affiliate club F.C. Vizela in the Segunda Divisão Portuguesa.
2008-2010: Signed three-year contract with Sporting de Braga in Portugal's Primeira Liga, beginning with their U19 academy.
2004-2007: Member of Aigle Noir Athlétique Club in native Port-au-Prince, Haiti. The club won the Division 1 Ligue Haïtienne, or Digicel D1, in 2006 and qualified for the 2006 CFU Club Champions' Cup.
NATIONAL TEAM: Capped at the senior level for Haiti, Joseph earned his first international appearance in a 2010 FIFA World Cup qualifier against Netherlands Antilles. Joseph has gone on to represent Haiti on five more occasions, most recently in a friendly against El Salvador in February 2011. Joseph also captained Haiti at the 2007 FIFA U-17 World Cup in South Korea.