He was to remain on probation for the next four years and one month, and had to register with the Iowa Sex Offender Registry before his release. Pierce was named to the roster of Golden State Warriors' 2007 NBA Summer League competition in Las Vegas, in which he played impressively, averaging 21.5 points in his first two games. Because the terms of his probation prevented him from leaving Iowa to pursue a career with the NBA, his participation in the Nevada-based summer league was a violation, which resulted in him being sentenced in April 2008 to 30 days' jail. In September 2008, the Iowa Supreme Court allowed Pierce to leave Iowa to play professionally in France where he signed a $120,000 contract with a team (Hyères-Toulon Var Basket) in their top professional league in which he averaged 13.6 points, 4.4 rebounds and 5.1 assists in 30 French League games. In July 2010 he signed a one-year deal with Greek club Aris BC. In February 2011 he signed with BC Azovmash. He last played for l'Angers Basket Club in France in 2014-15 season.