Education
Moeller High School.
Moeller High School.
After playing high school basketball at Moeller High School, in Cincinnati, Ohio, Duncan played 4 seasons of college basketball at the Xavier University, with the Xavier Musketeers. Duncan went undrafted in the 2008 National Basketball Association draft. In July 2008, he signed his first professional contract with Élan Béarnais Pau-Orthez of France.
In July 2009, he signed with Liège Basket of Belgium.
From 2010 to 2012 Duncan played with Maccabi Ashdod of the Israeli Basketball Super League. In June 2012, he signed with another Israeli team Hapoel Jerusalem.
On July 2, 2014, Duncan signed a two-year deal with the German team Brose Baskets. On July 7, 2015, he left Brose and returned to Hapoel Jerusalem.