Josh Douglas Harrellson (born February 12, 1989) is an American professional basketball player for Saga Ballooners of the Japanese B.League.

Coach Gary Wacker helped develop Harrellson's skills, and he was named a first-team All-State player his junior and senior years.

[5] Wacker later recalled that, when he first started practice, he could not dribble or make a left-handed layup, and Harrellson himself conceded that he was "pretty much the worst player on the team.

[4] By his junior year, he had grown to 6 feet, 8 inches tall; he averaged 18.1 points and 11 rebounds for the season and was named a first team All-State player.

[3][6] After taking only one recruiting visit, he signed a National Letter of Intent to play for the Western Illinois Leathernecks prior to his senior year.

[7] He averaged 18.5 points, 10.5 rebounds, 3.6 blocked shots, 1.5 assists and 1.3 steals during his final season of high school basketball, while leading St. Charles to the Class 4 state semi-finals.

[7] Before enrolling at Western Illinois, Harrellson asked to be released from his letter of intent, citing rumors that head coach Derek Thomas was about to be fired and his desire to play for a higher-profile school.

[3] His parents divorced following his high school graduation, and he chose Southwestern Illinois College because it was close to home.

[3] In March 2008, Western Illinois fired coach Derek Thomas, and Harrellson was released from his Letter of Intent in April of that year.

[10] Despite his desire to stay close to home, in part because of his parents' recent divorce, Harrellson chose Kentucky because of the chance for better exposure, which would lead to an opportunity to play professional basketball.

[12] He was named to the Las Vegas Invitational All-Tournament Team; he posted his first career double-double (12 points, 10 rebounds) in the tournament's championship game against the West Virginia Mountaineers.

[14] After the game, Gillispie made Harrellson ride back to Lexington in the equipment van instead of on the bus with his teammates.

[5][12] Following the 2009–2010 season, Harrellson and teammate Jon Hood played nine games in China as part of an exhibition team assembled by Campbellsville, Kentucky-based Sports Reach.

[21] Harrellson was pressed into playing heavy minutes by the NCAA's decision to rule teammate Enes Kanter ineligible for accepting excessive benefits from a professional team in Turkey.

[23] He achieved career highs in points (24) and rebounds (14) against in-state rival Louisville on December 31, 2010, but regressed once conference play began.

[26] In the 2011 NCAA tournament, Harrellson averaged 13 points and 8 rebounds, including a 17-point, 10-rebound, 3-block performance against Ohio State All-American Jared Sullinger in the third round.

[30] In his final game as a Wildcat, a one-point loss to the Connecticut Huskies in the national semi-finals, Harrellson managed only 6 points and 4 rebounds.

[34] On December 31, 2011, he started for the first time for the injured Amar'e Stoudemire and achieved his first double-double against the Sacramento Kings with 14 points, going 4 of 8 from the 3-point line, and 12 rebounds.

On July 11, 2012, Harrellson was traded by the Knicks to the Houston Rockets along with Toney Douglas, Jerome Jordan and second-round picks in 2014 and 2015 for Marcus Camby.

[2] While playing in China, Harrellson averaged 22.3 points, 18.2 rebounds, 1.9 assists, 1.5 blocks and 1.2 steals to win the NBL Player of the Year award.