Moses Shirief-Lamar Brown (born October 13, 1999) is an American professional basketball player for the Boston Celtics of the National Basketball Association (NBA). He played college basketball for the UCLA Bruins. The 7-foot-2-inch (2.18 m) center was named a McDonald's All-American as a high school senior in 2018. In his only year with UCLA, Brown was voted to the all-freshman team in the Pac-12 Conference. After going undrafted in the 2019 NBA draft, Brown spent his rookie season on a two-way contract with the Portland Trail Blazers. He joined the Thunder on a two-way deal for 2020–21 before signing a multi-year, standard NBA contract midseason.