 He returned to action on February 27, 2018 against the Los Angeles Clippers, recording nine points and seven rebounds in 23½ minutes in a 122–120 loss.On March 30, 2018, he scored a season-high 36 points to help the Nuggets beat the Oklahoma City Thunder 126–125 in overtime.On December 3, 2018, Millsap was named Western Conference Player of the Week for games played from Monday November 26 to Sunday December 2.