He was noted for his ability to project above the roaring crowds at the NHL arenas. He acknowledged that his booming call, "HE SHOOTS, HE SCORRRES!" was patterned after that of the famous long-time NHL announcer Foster Hewitt.
Kelly called two of the most famous goals in hockey history. One was Bobby Orr's Cup-winning overtime goal in 1970. The other was Mario Lemieux's goal with 1:26 remaining in the decisive game of the 1987 Canada Cup:
Bobby Orr... behind the net to Sanderson to OOOORR! BOBBY OOOORR! . . . scores, and the Boston Bruins have won the Stanley Cup!
Hawerchuk wins it and here's Lemieux poking it to centre. Lemieux ahead to Gretzky, has Murphy with him on a two-on-one. To Lemieux. In on goal. He shoots! HE SCORES!! Mario Lemieux, with 1:26 remaining!
Kelly was also in the booth for another Stanley Cup winning goal, calling the action for CBS as Bob Nystrom won the Cup for the Islanders in 1980:
Islanders' number 10, Henning to Tonelli. Here's Tonelli with Nystrom. The pass to Nystrom -- HE SCOOORES! BOB NYSTROM! And the New York Islanders have won the Stanley Cup!
He also called a Stanley Cup semifinal in 1971 at Chicago Stadium (nicknamed "The Madhouse on Madison"). When the Blackhawks scored an empty-netter to clinch the series, he yelled, "I can feel our broadcast booth shaking! That's the kind of place Chicago Stadium is right now!"
Other sports broadcast by Kelly besides hockey
Kelly died on February 10, 1989 from lung cancer. His sons, John and Dan, have been broadcasting NHL games for various NHL franchises, including the Blues, for whom John is currently doing the television play-by-play.
Several months after his death, Kelly was posthumously awarded the Lester Patrick Trophy. In 2006, the St. Louis Blues dedicated the Scottrade Center press box in honor of Kelly.