In January 1958, Del Johnson opened the first Sizzler Restaurant in Culver City, California and by 1967, Del owned four restaurants and 160 franchised restaurants. Upon Del's retirement, Collins Foods International (CFI) bought all of Sizzler's holdings. CFI made important and innovative changes to the Sizzler concept. They stepped away from the "fast food" atmosphere and changed their menu to include steak-seafood combination platters. By 1972, Sizzler had 200 restaurants and expanded to 23 states and, by 1983, CFI operated and franchised 441 Sizzler restaurants: 139 company operated and 302 franchised in 30 states as well as Guam, Kuwait, Saudi Arabia and the United Arab Emirates.
Sizzler continued to evolve in response to competition and changing consumer tastes. They, also, continued to grow and by the late 1980's, Sizzler expanded to Australia, New Zealand, Indonesia, Singapore, Taiwan and Thailand. Sizzler reached its peak and greatest size in 1992 with 786 restaurants worldwide generating sales of about $1.1 billion. CFI restructured as Sizzler International and currently includes 300 Sizzler restaurants worldwide and 113 KFC restaurants in Queensland, Australia.