Indiana Pacers (2016–2017) On June 23, 2016, Niang was selected by the
Indiana Pacers with the 50th overall pick in the
2016 NBA draft. He joined the team for the
2016 NBA Summer League, where his early play drew praise from
Larry Bird. On July 11, 2016, he signed with the Pacers. During his rookie season, he had multiple assignments with the
Fort Wayne Mad Ants of the
NBA Development League. On July 14, 2017, he was waived by the Pacers.
Santa Cruz Warriors (2017–2018) On August 16, 2017, Niang signed an Exhibit 10 contract with the
Golden State Warriors. He was waived by the Warriors on October 14, 2017. He subsequently joined the
Santa Cruz Warriors as an affiliate player.
Utah Jazz (2018–2021) On January 14, 2018, Niang signed a
two-way contract with the
Utah Jazz to take up a spot previously held by former college teammate
Naz Mitrou-Long. Throughout the rest of the season, he split his playing time between the Jazz and their
NBA G League affiliate, the
Salt Lake City Stars. On July 13, 2018, Niang signed a standard contract with the Jazz.
Philadelphia 76ers (2021–2023) in 2022 On August 9, 2021, Niang signed a two-year, $6.7 million contract with the
Philadelphia 76ers. With the team, he carried over the "Minivan" nickname he maintained in Utah. His time with the 76ers accounted for his most sizable role - backing up forward
Tobias Harris among others - and points per game to that point in his career. Niang had his highest scoring output as a Sixer on April 7, 2023, posting 24 points in a 136–131 overtime win over the
Atlanta Hawks on 5-7 shooting from 3.
Cleveland Cavaliers (2023–2025) On July 6, 2023, Niang signed with the
Cleveland Cavaliers. On January 17, 2024, Niang scored a new career high of 33 points against the
Milwaukee Bucks, making 13 of his 14 shots attempts. In the
2023-24 NBA season Niang played 82 games, averaging 9.4 points per game.
Atlanta Hawks (2025) On February 6, 2025, Niang, along with
Caris LeVert, three second-round picks, and two pick swaps were traded to the
Atlanta Hawks in exchange for
De'Andre Hunter. On July 7, 2025, Niang and a future second-round pick were traded to the
Boston Celtics in a three-team trade that sent
Kristaps Porziņģis and a second-round pick to the Hawks, and
Terance Mann and the draft rights to
Drake Powell (the 22nd pick in the
2025 NBA draft) to the
Brooklyn Nets. On August 6, before ever appearing in a game for Boston, Niang was traded back to the
Utah Jazz alongside two future second-round draft picks in exchange for
RJ Luis Jr. and an $8 million trade exception. The Jazz considered Niang a great veteran presence and want him to be a positive impact on the younger players in the locker room, however, he didn't make an appearance for the Jazz because of a foot injury. On February 3, 2026, Niang,
Kyle Anderson,
Walter Clayton Jr.,
Taylor Hendricks, and three first-round draft picks were traded to the
Grizzlies in exchange for
Jaren Jackson Jr.,
John Konchar,
Jock Landale, and
Vince Williams Jr. On February 5, Niang was waived by the Grizzlies. ==Career statistics==