Riggin played in eight games for the Flyers before joining them on full time basis during the 1956-57 season. In his first complete season in Edmonton, Dennis Riggin was a WHL Prairie Division Second Team All-Star goaltender as well as WHL Prairie Division Rookie of the Year.

In 1957-58, Riggin split his time with the Flyers and the WHL's Calgary Stampeders, and for the second consecutive season was recognised as the WHL Prairie Division First Team All-Star goaltender.

Although he spent the majority of the 1958-59 season in Edmonton with the Flyers, Dennis Riggin made his NHL debut with the Detroit Red Wings, where in nine games he went 2-6-1 with a 3.49 GAA.

The 1960-61 season was a return to Edmonton and another year of solid play in goal for the Flyers, earning Riggin a WHL Prairie Division Second Team All-Star selection. In November of 1961, Dennis Riggin suffered eventual career-ending eye injury 10 games into the season vs. Seattle. Even after suffering such an injury, Riggin played one more season before having to retire from the game.

Following his eye injury in 1960-61, Dennis Riggin played in nine games with the Red Wings during the 1961-62 season going 5-3-1 with 3.00 GAA while splitting his time with Edmonton and Pittsburgh Hornets of the American Hockey League.

Due to his injury that he suffered during the 1960-61 season, Dennis Riggin retired from the game of hockey having played in 18 career NHL games with 7-9-2 record and a 3.12 GAA.

Courtesy of the Hockey Hall of Fame