Born in Waco, Texas, to Johnnie and Judy Dolezel, Clint attended Robinson High School in Robinson, Texas where he was a standout Quarterback and Golfer. After graduation from Robinson, Dolezel attended Cisco College. After committing to the University of Southern Mississippi, a coaching change landed Dolezel at East Texas State University to play for coach Eddie Vowell.
Dolezel attended Cisco Junior College and was a student and a letterman in football. In football, he was a second team All-Conference selection as a sophomore. Dolezel attended East Texas State University upon his graduation from Cisco, and was a letterman in football and golf. Dolezel Quarterbacked the Lions in 1992 and 1993 and ended his career as a Lion throwing for 3,152 yards and 23 touchdowns over 2 seasons. The Lions finished 8-2 in Dolezel's Junior year and finished 2nd in the Lone Star Conference.
After establishing himself as one of the best young quarterbacks in the AFL, Dolezel signed with the Chicago Bears in 2000.
Dolezel, along with wide receiver Terrill Shaw, helped the Grand Rapids Rampage win the 2001 ArenaBowl. Dolezel and Shaw became teammates again playing for the Dallas Desperados in 2006.
In September, 2003, the Rampage traded Dolezel to the Las Vegas Gladiators for Sedrick Robinson, Paul LaQuerre and Hardy Mitchell.
On March 12, 2006, Dolezel threw his 700th career touchdown, becoming just the third quarterback in AFL history to do so. The Desperados won that game versus the Tampa Bay Storm 64–35.
On April 16, 2007, in a 51–41 home win against the Philadelphia Soul, Dolezel became the first professional quarterback to throw 800 touchdown passes. In 2007, Dolezel became the first quarterback in league history to lead his team to 15 wins in a season. Despite the 15–1 record, Dallas lost to the 7–9 Columbus Destroyers in the first round of the playoffs. In a 2008 game versus the Grand Rapids Rampage, Dolezel became the first quarterback in league history to throw for 900 touchdown passes in a career.
Stats from ArenaFan:
Dolezel had said that he would like to be a coach after his career is over. It was announced that on January 19, Dolezel would become the offensive coordinator for the Florida Firecats' 2009 season (due to the Arena Football League suspending operations for 2009). He was the head coach of the San Angelo Stampede Express of the Indoor Football League in 2010.
Dolezel was announced as the head coach for the Dallas Vigilantes for the 2011 season. The team did not play in 2012 for unknown reasons.
On August 21, 2012, Dolezel was promoted from offensive coordinator to head coach of the Philadelphia Soul.
On September 16, 2014, Dolezel re-signed with the Soul for two more seasons.
In June 2016, Dolezel was announced as the first head coach of the China Arena Football League's Beijing Lions. On November 6, 2016, the Lions won the first China Bowl and finished the season undefeated.
On August 25, 2016, Dolezel was named the 2016 Marcum-Moss Head Coach of the Year. A day later, he won his first ArenaBowl championship as a coach when the Soul defeated the Arizona Rattlers, 56–42, in ArenaBowl XXIX in Glendale, Arizona.
On August 26, 2017, the Soul beat the Tampa Bay Storm in ArenaBowl XXX by a score of 44–40.