The Celtics acquired Luis Jr. for Niang, who will likely spend his rookie season in Maine. Luis Jr. went undrafted out of St. John's, where he played two seasons after he started his college career at UMass. The 6-foot-7 guard averaged 14.1 points off 43.9 percent shooting and 5.6 rebounds per game over his three collegiate seasons.

Boston, which will be without star Jayson Tatum for most of the year after he suffered a torn Achilles, is clearly looking to save money this season. After trading Niang and signing Boucher, the Celtics are now $6.9 million below the second apron and $5 million over the first apron.

The Celtics moved off Georges Niang's salary in a deal with the Jazz before signing free agent forward Chris Boucher to a one-year deal.