[5][6][7][8] Harris began the 2009–10 NCAA Division I men's basketball season by recording the second triple double in school history.

Harris previously attended Redford High School in Detroit, Michigan, where he won the state's Mr. Basketball award as a senior.

[9] Harris was highly recruited, receiving offers from Tennessee, UCLA, Wisconsin, George Washington, and Indiana before committing to the University of Michigan.

[20] Although he was the leading returning scorer and top draft prospect,[21] Purdue's Robbie Hummel was named Big Ten Preseason Player of the Year.

[27] On February 5, Harris was selected along with Kalin Lucas as one of only two Big Ten John R. Wooden Award 2008–09 Midseason Top 30 Candidates.

[28] On March 5, the National Association of Basketball Coaches honored Harris as a District 7 (Big Ten)[29] first-team selection along with four other sophomores (Lucas, Turner, Battle, and JaJuan Johnson).

[2][31] He was also chosen on March 10 by the U.S. Basketball Writers Association for its 2008–09 Men's Division I District V (OH, IN, IL, MI, MN, WI) Team, based on voting from its national membership.

[32] On March 26 Harris was honored as one of four Michigan men's basketball Winter Sports Big Ten Academic All-Conference selections.

[38] Entering the 2009–10 NCAA Division I men's basketball season for the 2009–10 Wolverines, Harris was named to the FOX Sports preseason All-American list included him on its second team.

[42] Harris opened the season by recording the second triple double in school history (Gary Grant was the first) against Division II Northern Michigan.

[4] He was recognized as an All-District second-team selection by the National Association of Basketball Coaches making him eligible for the State Farm Division I All‐America teams.

[49] Harris finished the season among the Big Ten Conference leaders in several statistical categories including: fourth in scoring, tenth in rebounds, fifth in assists, seventh in free throw percentage, second in steals (1.83 to 1.81), and eighth in minutes played.

[55] After being an undrafted player from Michigan for about 31⁄2 months, Harris joined the Cleveland Cavaliers with a #6 jersey number as a non-guaranteed free agent member of the 20-man preseason roster.

[59] After compiling a 7–14 record in the first 21 games, head coach Byron Scott shuffled the lineup on December 8, and Harris played twenty-one minutes that night.

[61] In his fourth start on January 7 against the Golden State, Harris posted his first double-double with career highs of 16 points and 10 rebounds and added 3 steals and 4 assists, too.

The move, which surprisingly left Mychel Thompson on the roster, was attributed to a freezer burn that Harris suffered on his foot during the 2011 NBA lockout in a cooling chamber designed to augment recuperation from injuries at the Nike facility in Oregon.

[75] On February 3, Harris logged his professional career-high 14 rebounds along with 21 points on his way to his second D-League double-double against the Austin Toros.

[76] On February 16, Harris posted a new career high 46 points along with 9 rebounds, 6 assists and 4 steals against the Rio Grande Valley Vipers.

[85] On April 6 with Parker, Kyrie Irving and Gibson all injured, Harris made his first start of the season and 16th of his career against the Toronto Raptors.

[86][87][88] On April 20, Harris posted his first NBA double-double of the season with 19 points and a game-high and career-high 12 rebounds against the New York Knicks.

At the time of the announcement, Harris was one of at five players on an NBA roster that were selected, but who had played over half of their D-League team's games through January 26.

[115] That night, although Nash and Blake returned to the starting lineup against Minnesota, Jodie Meeks and Jordan Hill were injured in the first quarter and Harris contributed 19 points and 8 rebounds even though he had been told before the game he would not be re-signed.

On February 8, 2014, Harris again set a new D-Fenders franchise scoring record, this time with 56 points, while adding 15 rebounds against the Santa Cruz Warriors.

[125][126] After playing a total of 22 games in the NBA D-League for the D-Fenders and averaging 31.6 points, 7.9 rebounds and 3.7 assists, Harris signed with Türk Telekom B.K.

The D-Fenders set new NBA Development League records of most points scored in a single quarter, half and game en route to a 175–152 win over Reno.

[134][135] On December 30, Harris left Los Angeles in order to sign with Eskişehir Basket of the Turkish Basketball League the following day.

[142] On November 12, Harris established a Texas Legends franchise record by scoring 49 points in the season opener against the Maine Red Claws.

[162] On September 3, 2018, Harris signed with Greek club Olympiacos, for their preseason practices, while their rosters were depleted due to the 2019 FIBA Basketball World Cup qualification events.

[165] On October 17, 2019, Harris joined the NLEX Road Warriors of the Philippine Basketball Association for the PBA Governor's Cup.

[171] On November 5, he was named CBA player of the week after posting 44 points and ten rebounds, while his team defeated the Nanjing Monkey Kings.