Boston coach Brad Stevens put Tatum and Fournier back into the game in the fourth when Minnesota trimmed the lead to 11.
“We needed to feel good,” Stevens said.
The Celtics connected on 13 of 30 shots from the arc in the first half to build a 66-47 halftime lead. Minnesota was just 2 of 17 from deep in the first two quarters, with its starting lineup going 0 of 14 from 3-point range. The two were the same year in high school and Stevens first saw Garnett play in an AAU tournament. Beasley has been sidelined with a left hamstring strain since April 3.
Celtics: Boston’s regular season ends with a game Sunday in New York against the Knicks, less than 24 hours after Saturday’s game in Minnesota.