He led his team to three BCL and MIAA Championships and earned Player of the Year and All Metro honors.

He had his best year as a senior, averaging 11.6 points, 6.0 rebounds and 3.5 assists per game connecting on 46.3 percent of his field goals.

On April 1, 2013, his contract was bought out by the BayHawks,[4] and a day later, signed with the Petron Blaze Boosters of the Philippines.

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.

[13] On March 22, 2014, Sims recorded 18 points and a career high 15 rebounds in an 81–91 loss to the Chicago Bulls.

[18] 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.

[20] 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.

[23] On September 22, 2016, Sims signed with the Utah Jazz,[24] but was waived on October 20 after appearing in three preseason games.

[29] 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.

[36] 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.