The Spurs entered the World Hockey Association for the 1975–76 season. A Sports Illustrated preview on the upcoming WHA season noted it was stalwart Gordie Howe's 29th year in major league hockey—and the Spurs' first. The magazine picked the expansion team to finish last in the WHA's Western Division and darkly predicted that Denver's time in the big leagues "may turn out to be 28 years less than Gordie's."
Veteran Ralph Backstrom was one of the Spurs' few experienced players, but at 38 he was in decline (still, he wound up leading the team with 50 points in 41 games). The rest of the roster was filled with cast-offs and career minor-leaguers, such as Don Borgeson, who had played for the WHL Spurs from 1971-73; he finished second to Backstrom in points scored with 41.
Predictably, the Spurs began losing games in earnest, as well as in Phoenix, Indianapolis, Houston, San Diego... by December 30 (even with a minisurge earlier in the month which saw the Spurs win four of five), they were in the Western Division cellar with a 13–20–1 mark, despite an overtime win over the Indianapolis Racers that night, in Denver. It would turn out to be the last game the Spurs would ever play in Colorado.
Unfortunately, fans in the area had been banking on joining the NHL, and did not consider the WHA to be a major league. As a result, the team didn't draw very well early on (average attendance of less than 3,000 per game in a 16,800-seat arena). Combined with ongoing reports that an NHL team (either the Kansas City Scouts or California Golden Seals) was planning to relocate to Denver, Spurs owner Ike Mullenix sold the team to a group of Canadian businessmen in the middle of the season. They quietly moved the team to Ottawa on January 2, 1976, where the team was renamed Ottawa Civics. The Civics would only survive for two weeks before folding for good.
The hastily-arranged move is hockey legend, as the players, who were on the road, only learned of the move to Ottawa when they stood on the ice for their next road game (in their Denver colors) and suddenly heard O Canada being played.
Note: GP = Games played, W = Wins, L = Losses, T = Ties, Pts = Points, GF = Goals for, GA = Goals against, PIM = Penalties in minutes
| Season | GP | W | L | T | Pts | GF | GA | PIM | Standing |
| 1968–69 | 74 | 23 | 44 | 7 | 53 | 254 | 308 | 683 | 6th, WHL |
| 1969–70 | 72 | 24 | 37 | 11 | 59 | 250 | 316 | 736 | 6th, WHL |
| 1970–71 | 72 | 25 | 31 | 16 | 66 | 242 | 253 | 804 | 4th, WHL |
| 1971–72 | 72 | 44 | 20 | 8 | 96 | 293 | 209 | 993 | 1st, WHL |
| 1972–73 | 72 | 27 | 32 | 13 | 67 | 264 | 275 | 1022 | 4th, WHL |
| 1973–74 | 78 | 28 | 50 | 0 | 56 | 249 | 335 | ? | 6th, WHL |
| 1974–75 | 78 | 36 | 29 | 13 | 85 | 285 | 263 | 1406 | 2nd, Northern |
| 1975–76 | 41 | 14 | 26 | 1 | 29 | 134 | 172 | 536 | 6th, Canadian |