Roth comes to Toronto following one season as an assistant coach with the Golden State Warriors. Prior to that he was the head coach of the Bakersfield Jam of the NBA D-League in 2008-09 and guided the team to its first post-season appearance with a 26-24 record.
Roth has served seven seasons in the NBA as an assistant coach with the Dallas Mavericks (1996-2000) and Vancouver/Memphis Grizzlies (2000-02), and four seasons as a scout and advisor for the Milwaukee Bucks.
In 2000, Roth was the head coach of the Turkish National Team when they claimed a silver medal at the European Championships held in Istanbul. A year later he guided Turkey at the 2001 World Championships in Indianapolis. Most recently, he was the head coach of the Dominican Republic National Team in 2007 and 2008, earning a silver medal at the CBC Caribbean Championships in Puerto Rico.
Following a standout collegiate career at the University of Wisconsin, Roth was selected in the fourth round of the 1985 NBA Draft by the San Antonio Spurs. He opted to begin his professional playing career overseas with Efes Pilsen in Turkey. He returned to North America in 1987 and appeared in 160 NBA games with the Utah Jazz (1987-88), San Antonio Spurs (1988-89) and Minnesota Timberwolves (1989-90) before returning to Europe to finish his career.