Kurt began his basketball career on the playgrounds at Dallas Birdie Alexander Elementary, D.A. Hulcy Middle School, and thereafter on to Dallas Carter High before transferring to Hillcrest High. Thomas grew up in Dallas, and after graduating from Dallas's Hillcrest High School, he attended Texas Christian University, where he led the NCAA Division I in scoring and rebounding in the 1994–95 season with 28.9 PPG and 14.6 RPG, becoming only the third player in history to accomplish this feat.
NBA career
Miami Heat (1995-1997)
Thomas began his NBA career with the Miami Heat from 1995 to 1997. In his rookie season, he started 42 of his 74 games played. The following season, he only played 18 games before suffering a stress fracture in his right ankle, which required surgery. He would miss the rest of the season. During his rehab, Thomas, along with Sasha Danilović and Martin Müürsepp, were traded to the Dallas Mavericks for Jamal Mashburn.
Dallas Mavericks (1997-1998)
Thomas's playing career with Dallas was short. He only played 5 games before suffering another stress fracture in the same ankle he had previously injured. This placed him on the injured list for the remainder of the season. Then-coach and general manager Don Nelson went out of his way to hire Thomas as an assistant coach. In the offseason, Thomas decided to become a free agent, signing with the New York Knicks.
New York Knicks (1998–2005)
Thomas played seven seasons with the New York Knicks from 1998 to 2005, during which the team went to the playoffs four times, including two trips to the Eastern Conference Finals and one trip to the NBA Finals.
On July 20, 2007, Thomas, along with the Suns' first-round draft choices in 2008 and 2010, was traded by the Suns to the Seattle SuperSonics in exchange for a conditional second-round draft choice and an $8 million trade exception.
On July 26, 2010, the Chicago Bulls announced that they had signed Kurt Thomas. Because of injuries to the Bulls' starting centerJoakim Noah and power forwardCarlos Boozer, Kurt Thomas saw some significant playing time, including 37 starts. When Noah and Boozer came back, he experienced minimal playing time with Ömer Aşık playing in front of him on the bench. Although his playing time was slim during this span, Kurt Thomas won the appeal of Chicago fans with some emphatic highlights which were referred to as "Turning back the Clock" and eventually earned him the nickname "Big Sexy". Thomas averaged more than 20 minutes per game during the 2010-11 season along with 4.1 points and 5.8 rebounds.
On December 11, 2011, the Portland Trail Blazers signed Thomas for the shortened 2011-2012 season. Though terms for the deal were not disclosed officially, it was reported to be a two-year contract.