Complex sentence: The franchise renamed itself the Calgary Centennials the following year, and had moderate success in the mid 1970s, winning three division titles and reaching the league finals once, but would relocate to Billings, Montana in 1977 to become the Billings Bighorns.
Split into simpler sentences: The franchise renamed itself the Calgary Centennials the following year, and had moderate success in the mid- 1970s, winning three division titles and reaching the league finals once. It relocated to Billings, Montana in 1977 to become the Billings Bighorns.