Regis "Pep" Kelly spent the 1933-34 season with the St. Michael's Majors before joining the Toronto Maple Leafs for the '34-'35 campaign.
Kelly scored 11 goals as a rookie and added eight assists in 47 games. He matched that output exactly the following year but he struggled out of the gate during his third year in the league. In sixteen games he scored just two goals and was sent to Chicago.
With the Black Hawks he was able to turn his season around. In 29 games with Chicago he scored a career high 13 goals and added four assists. The next three seasons he was back in Toronto with the Maple Leafs "Pep" continued to produce at roughly the same pace, with his best year coming in 1938-39 when he scored 11 goals and 22 points, good for a career-best point total.
In 1940 he was traded back to the Black Hawks but didn't enjoy the success he had during his first stint with the club. After scoring just eight points in 21 games that season, Kelly's days in the Windy City were over with the rest of his year spent toiling in the American Hockey League.
The 1941-42 season began in the minors again but his rights were soon transferred to the Brooklyn Americans. Though must of his year was spent in the AHL, Brooklyn did use him in eight games, and they proved to be his last in the National Hockey League.
After spending all of the 1942-43 season in the AHL, Kelly joined the Northern Ontario Hockey League for his final two seasons before taking his final lap around the rink and retiring from the game.