Erie BayHawks (2012–2013) After going undrafted in the 2012 NBA draft, Sims joined the
Utah Jazz for the Orlando Summer League and
Chicago Bulls for the Las Vegas Summer League. On September 10, 2012, he signed with the
New York Knicks. However, he was waived on October 27. In November 2012, he was acquired by the
Erie BayHawks.
New Orleans Hornets / Erie BayHawks / Petron Blaze Boosters (2013) On March 3, 2013, Sims signed a 10-day contract with the
New Orleans Hornets. He appeared in two games for the Hornets recording a total of four points and two rebounds. He was released by the Hornets on March 12, 2013 and returned to the BayHawks. On April 1, 2013, his contract was bought out by the BayHawks,
Cleveland Cavaliers (2013–2014) He joined the
Charlotte Bobcats for the
2013 NBA Summer League. On September 30, 2013, he signed with the
Cleveland Cavaliers. He was recalled by the Cavaliers on December 9. On December 11, he was reassigned to Canton. He was recalled the next day.
Philadelphia 76ers (2014–2015) On February 20, 2014, Sims was traded to the
Philadelphia 76ers along with
Earl Clark and two future second-round picks in exchange for
Spencer Hawes. On March 22, 2014, Sims recorded 18 points and a career high 15 rebounds in an 81–91 loss to the Chicago Bulls. On April 4, 2014, Sims recorded a career high 24 points in a 111–102 win over the Boston Celtics.
Grand Rapids Drive (2015–2016) On September 16, 2015, Sims signed with the
Phoenix Suns. However, he was later waived by the Suns on October 24 after appearing in all six of the team's preseason games. On November 12, he was acquired by the
Grand Rapids Drive of the NBA Development League. On November 14, he made his debut for Grand Rapids in a 113–101 win over the
Delaware 87ers, recording 15 points, seven rebounds, one assist and one block in 19 minutes off the bench.
Brooklyn Nets (2016) On March 17, 2016, Sims signed a 10-day contract with the
Brooklyn Nets. Two days later, he made his debut in a 115–113 loss to the
Detroit Pistons, recording 10 points, eight rebounds, one steal and one block in 20 minutes off the bench. On March 27, he signed a second 10-day contract with the Nets, and on April 6, he signed with the team for the rest of the season.
Salt Lake City Stars (2016) On September 22, 2016, Sims signed with the
Utah Jazz, but was waived on October 20 after appearing in three preseason games. On October 31, he was acquired by the
Salt Lake City Stars of the
NBA Development League. On December 12, Sims early terminated his contract with Salt Lake City. In 11 games, he averaged 18.2 points, 8.3 rebounds and 2.0 assists in 29.7 minutes.
Shanxi Brave Dragons (2016–2017) On December 20, 2016, Sims signed with the
Shanxi Brave Dragons of the
Chinese Basketball Association.
Salt Lake City Stars (2017) On February 27, 2017, Sims was acquired by the
Salt Lake City Stars of the
NBA Development League, returning to the franchise for a second stint.
Vanoli Cremona (2017–2018) On August 15, 2017, Sims signed with Italian club
Vanoli Cremona of the
Lega Basket Serie A.
Virtus Roma (2018–2019) Sims signed with
Virtus Roma of the Italian second division on August 6, 2018.
Fortitudo Bologna (2019–2020) On August 6, 2019, he has signed contract with
Fortitudo Bologna of the Italian
Lega Basket Serie A (LBA). Sims averaged 15.1 points and 8.9 rebounds per game. He opted out of his deal on July 7, 2020.
Incheon Electroland Elephants (2020–2021) On July 8, 2020, Sims signed with the
Incheon Electroland Elephants.
Reggio Emilia (2021) On February 14, 2021, Sims returned to Italy and signed until the end of the
season for
Reggio Emilia of the Italian
Lega Basket Serie A (LBA) that was also playing the
FIBA Europe Cup. He left the team one match before the end of the regular season.
Universo Treviso (2021–2022) On July 23, 2021, Sims signed with
Universo Treviso. ==Career statistics==