Zavier Marquis Simpson (born February 11, 1997) is an American professional basketball player for U-BT Cluj-Napoca of the Liga Națională de Baschet Masculin (LNBM), the Romanian Cup and the EuroCup.

[12][13] Austin Davis, Ibi Watson, Jon Teske and Simpson all signed their National Letters of Intent on November 11, 2015.

[6] Michigan recruits Simpson, Watson and Teske were all named to the 2015–16 Associated Press Ohio High School Division I Boys Basketball All-State 1st Team.

[15] Sources: As a freshman, Simpson was part of a 2016–17 Michigan Wolverines team that won the 2017 Big Ten Conference men's basketball tournament.

[18][19] After averaging 1.6 points and 8.7 minutes as a freshman, Simpson changed the spelling of his name prior to his sophomore season from Xavier to Zavier.

[33][34] Simpson averaged 12.3 points, 4.8 rebounds, 4.0 assists and 1.3 steals in 35 minutes per game for Michigan in its four-game tournament run.

Simpson posted a career-high six steals as part of a stat line that included 11 points, 5 assists and 4 rebounds.

[39][40] In the first four games of the tournament, Simpson posted averages of 7.3 points, 5.0 rebounds, 4.5 assists and 2.8 steals to help Michigan reach the Final Four.

[41] The team lost in the 2018 NCAA Division I Men's Basketball Championship Game to (#2 Coaches Poll/#2 AP Poll) Villanova.

[43] On November 17, 2018, Simpson posted 14 points and 11 rebounds for his first career double-double, to help Michigan defeat George Washington 84–61.

[52][53] On January 22, Simpson was one of four Big Ten athletes named to the Naismith Defensive Player of the Year Award Top 15 midseason watchlist.

[54] On January 29 against Ohio State, Simpson posted 11 points, 10 rebounds and a career-high 12 assists, becoming the sixth player in Michigan program history to record a triple-double.

[59][60] On March 12, the U.S. Basketball Writers Association named Simpson to its 2012–13 Men's All-District V (OH, IN, IL, MI, MN, WI) Team, based upon voting from its national membership.

[63][64] On March 15, Michigan opened its 2019 Big Ten Conference men's basketball tournament play with a 74–53 victory over Iowa in the quarterfinals.

[65][66] The next day Simpson posted 15 points and nine assists in a 76–49 victory over Minnesota, helping Michigan advance to the Big Ten tournament final for the third consecutive season.

[69] On March 17 in the championship game, Simpson posted six points and ten assists in a 60–65 loss to Michigan State.

[71] On March 21, Simpson posted four points and ten assists in a 74–55 victory over Montana in the first round of the 2019 NCAA tournament.

[83][84] On January 26 at 3:03 AM, Simpson was the driver of Michigan Athletic director Warde Manuel's family vehicle when it made contact with a street sign and a utility pole, and gave a false name to the police regarding his involvement at the scene of the crash.

[102] On September 17, 2020, Simpson signed his first professional contract with Science City Jena of the German ProA,[103] but left the team before the start of the season.

[106] He landed with the Oklahoma City Blue of the NBA G League, making his debut in their season opener on February 11, 2021.

[110] Simpson made his NBA debut against the Portland Trail Blazers on April 5, 2022, where he played 44 minutes and recorded 10 points, 5 assists, 3 rebounds, and 2 blocks.

[120] The Detroit Pistons's NBA G League affiliate, Motor City Cruise acquired the returning player rights to Simpson in exchange for the 2024 NBA G League draft second round pick plus the returning rights for Reggie Perry and Devontae Cacok on July 27, 2023.

[123] However, he was waived on October 21[124] and nine days later, he joined the Motor City Cruise[125] where he played in 48 games and averaged 19.5 points, 4.8 rebounds, 8.3 assists and 1.3 steals in 36.6 minutes.