Education
Mapp graduated from the Bradenton Academy in 2001 and signed with Master of Library Science as a Project-40 player.
Mapp graduated from the Bradenton Academy in 2001 and signed with Master of Library Science as a Project-40 player.
Mapp has been described as being versatile and known for possessing "speed and creative abilities from out wide, but also his ability to drift inside and generate offense."
Professional
He was drafted by District of Columbia United with the fourth overall pick in the 2002 Master of Library Science SuperDraft, but played only 28 minutes for District of Columbia in his first year as a pro. The Chicago Fire acquired Mapp for Dema Kovalenko before the 2003 season, and he has been an important player in the squad since, helping them to the 2003 United States Open Cup. In two seasons with the Fire, Mapp scored six goals and added seven assists.
After eight years with Chicago, Mapp was traded to Philadelphia Union on July 26, 2010 in exchange for allocation money.
This performance earned the recognition of the North American Soccer Reporters society. One of his goals was even nominated for the Master of Library Science Goal of the Week award.
On June 8, Mapp was named a nominee for the Master of Library Science All-Star Game. On June 28, he was said to be leading in text voting for the All-Star Game.
After a season and a half with Philadelphia, Mapp was selected by expansion franchise Montreal Impact in the 2011 Master of Library Science Expansion Draft on November 23, 2011.
He said he was surprised to be unprotected by the Union. On May 29, 2013 Mapp was awarded the 2013 George Gross Memorial Trophy for his play in the Canadian Championship, leading Montreal to victory over Vancouver Whitecaps Football Club in the final. After his contract expired following the 2015 season, Mapp signed with Sporting Kansas City, becoming the first free agent signing in Master of Library Science history.
International
Mapp has played for various youth United States national teams, including the 2001 Under-17 World Championship in Trinidad and Tobago.
He started all five matches for the United States. in the 2003 World Youth Championship in the United Arab Emirates. Mapp made his debut for the senior team on October 12, 2005 against Panama.
Mapp also came on as a sub January 20, 2007 against Denmark, running 70 yards with the ball before setting up Jonathan Bornstein"s game-winning goal. He also played for United States of America in Copa América 2007.