Hansbrough later played professionally in the NBA Development League, Chinese Basketball Association and in the Baloncesto Superior Nacional.

He was honored by The Sporting News and Rupp,[5] and was named third-team All-America by the Associated Press, NABC and Basketball Times.

He was only the third ACC freshman to earn AP All-America honors, joining Kenny Anderson and Stephon Marbury of Georgia Tech.

He was a unanimous first-team All-ACC selection for the second consecutive year and led UNC (fourth in the ACC) in scoring with an average of 18.4 points per game.

[9][failed verification] On March 4, 2007, Hansbrough had 26 points and 17 rebounds before suffering an injury in the closing seconds of the Tar Heels' 86–72 win over Duke, clinching the top seed in the Atlantic Coast Conference tournament.

Hansbrough was second in total points in the NCAA behind Davidson's Stephen Curry (931), and had 399 rebounds, a UNC single-season record.

[9][failed verification] On February 3, 2008, in a game against Florida State, Hansbrough broke Lennie Rosenbluth's 51-year-old school record for made free throws.

[12] In the ACC semifinals on March 15, 2008, Hansbrough hit a baseline jump shot with 0.8 seconds remaining to give the Tar Heels a 68–66 victory over Virginia Tech.

[13] In the Final Four, Hansbrough was held below his season averages in both points and rebounds against Kansas, largely by freshman Cole Aldrich, as North Carolina lost the national semifinal, 84–66.

On December 18, 2008, in a home game against Evansville, Hansbrough broke North Carolina's all-time career scoring record, surpassing a 30-year-old mark held by Phil Ford (2,290 points).

On February 28, 2009, Hansbrough made his 906th career free throw in UNC's 104–74 win over Georgia Tech, breaking Dickie Hemric's (Wake Forest) NCAA record, set in 1955.

[19] While attending North Carolina, Hansbrough was given the nickname "Psycho T" due to his size and aggressive play style, as well as his off-court personality.

[22] After missing the preseason and the first four games of the regular season with an injury to his shin, he made his NBA debut against the Washington Wizards on November 6, 2009.

[23] Hansbrough was limited to 29 games in his rookie season due to assorted injuries including a season-long bout with vertigo.

[36] Hansbrough made his broadcasting debut on February 18, 2021, as a color commentator for the ACC Network when the North Carolina Tar Heels took on the Northeastern Huskies.

[41] Greg, despite being told he would never play organized sports, became the captain of his high school cross-country team, lettered in basketball and by 2011, he had run three marathons and 13 half-marathons.