Becoming a starter near the end of his freshman year at Illinois under head coachRon Turner, Kittner became one of the most prolific passers in Illinois history. He ended his tenure at Illinois as the school's all-time leader in career passing attempts, career passing touchdowns, passing touchdowns in a single season, and victories as a quarterback. Kittner wrapped up his collegiate career only 3 yards shy of Jack Trudeau's Illini record for all time passing yards. Entering his senior year, Kurt was considered a possible Heisman candidate. Kittner and receiver Brandon Lloyd led Illinois' offense as the Fighting Illini finished with a 7–1 record in the Big Ten and won their first Big Ten championship in 11 years on their way to a berth in the 2002 Sugar Bowl. Kittner's last collegiate game ended in a 47–34 loss against the LSU Tigers.
Professional career
Atlanta Falcons
Kittner was drafted in the 5th round of the 2002 NFL Draft by the Atlanta Falcons. He saw no action in his rookie year, being third-string quarterback behind Doug Johnson and 2001 first overall pick, Michael Vick. In 2003, after a preseason injury sidelined Vick and ineffective play caused second-string quarterback Doug Johnson to be benched, Kittner saw his first regular season action. Playing in seven games, he threw for 391 yards, scoring 2 touchdowns and throwing 6 interceptions. The highlight was a 27–7 win over the New York Giants at Giants Stadium where Kittner threw for a touchdown. The Falcons ended the season however with a 5–11 record.
Turbulent times
Since then, Kittner has not seen any further playing time in the NFL, having been released from 5 different teams in a 7-month span during the 2004 offseason. He did manage to make headlines in 2005, leading the Amsterdam Admirals to an NFL EuropeWorld Bowl Championship. His 239 passing yards and two touchdowns in World Bowl XIII earned him Most Valuable Player honors for the game. He is the second graduate of Schaumburg High School to earn the honor; Paul Justin won the award 10 years earlier for the Frankfurt Galaxy.
In 2005, Kittner was invited to training camp with the Chicago Bears and coach Turner, then offensive coordinator for Chicago. He earned a roster spot as the third-string quarterback. After starter Rex Grossman was injured in camp, journeyman Jeff Blake was brought in to back up rookie starter Kyle Orton, leaving Kittner at third string. When Grossman returned from injury on November 23, 2005, Kittner was released without playing a regular season down for the Bears.