In overtime, King had five points, including one of his four 3-pointers, and Wright added four points, as Colorado scored the first five points and never trailed.
Namon Wright had 19 points and Dominique Collier had 11 points for the Buffaloes (9-6, 1-2), who broke a three-game losing streak while limiting Arizona State to 36.0 percent shooting.
Guard Tra Holder scored 24 points and Kodi Justice had 16 for Arizona State (12-2, 0-2), which scored the first 11 points of the game but could not avoid its second straight loss after reaching No. 3 in the AP poll.
Shannon Evans II and Remy Martin had 11 points apiece for the Sun Devils, the last undefeated team in NCAA Division I before a six-point loss at Arizona on Saturday.
Arizona State led for almost 32 minutes before Tyler Bey made a layup to give Colorado its first lead at 55-54 with 8:26 remaining.
Namon Wright's 3-pointer with 4:54 remaining concluded a 21-7 run for a 65-59 lead before Arizona State recovered in the final minute.
Holder scored on three-point play with 38.8 seconds remaining to bring Arizona State within one at 73-72 before King made 1 of 2 free throws with 29.9 remaining for a 74-72 lead.
Mickey Mitchell made a driving dunk after getting an offensive rebound to tie the game at 74 with 5.9 seconds remaining. Mitchell had eight points, 10 rebounds and a career-high four assists in his sixth start.
Colorado had a 47-42 rebounding edge and made 10 of 27 3s, with reserve Collier hitting three.
The Sun Devils were 9-of-33 from distance, playing mainly against a Colorado zone defense. Second-leading scorer Evans II, averaging 17.0 points a game, was 3-for-14 from the field, 0-for-8 from 3-point range.
--Field Level Media
Arizona State | Colorado | |
Tra Holder 24 | Scoring | Namon Wright 19 |
Mickey Mitchell 4 | Assists | Dominique Collier 6 |
Romello White 11 | Rebounds | George King 9 |
Tra Holder 6 | Free Throws Made | Tyler Bey 4 |
Tra Holder 3 | Steals | McKinley Wright IV 2 |
Mickey Mitchell 1 | Blocks | Dallas Walton 3 |
Team | Points | FG% | 3PM-3PA | FTM-FTA | Assists | Rebounds | Blocks | Steals | Turnovers |
Arizona State | 81 | 35.5 | 9-34 | 18-24 | 11 | 40 | 2 | 5 | 7 |
Colorado | 90 | 46.0 | 10-26 | 22-32 | 16 | 43 | 6 | 3 | 14 |