Jeffery was 6 of 12 from the field in her double-double performance. She leads the Buffaloes in rebounding, averaging 8.1 per game.
Arielle Roberson had seven points and 11 rebounds for Colorado (14-2, 3-2 Pac-12).
Arizona State (10-7, 2-3) led 26-22 at halftime but could not keep pace with Colorado in the second half. Colorado shot 37.8 percent from the field for the game, while Arizona State shot 23.6 percent. Colorado outrebounded Arizona State 47-31.
Freshman Haley Videckis led the Sun Devils with 11 points. Janae Fulcher, Colorado’s scoring leader, had five rebounds and six points. Promise Amukamara also had five rebounds.