Pekovic overcame a sprained ankle to also haul down five rebounds as the Timberwolves beat the Celtics for the first time in 12 meetings and posted their second win three games overall.
Slumping Boston, meanwhile, fell for the seventh time in nine contests.
Avery Bradley led the Celtics with 19 points.
Aaron Carter is still in love with Hilary Duff
Boston schools pull out free condoms over wrapping complaints