He has testified before the U.S. House of Representatives concerning the Yucca Mountain nuclear waste repository.
Sam Neill | Sam Cooke | Sam Shepard | Sam Phillips | Uncle Sam | Sam Raimi | Sam Houston | Sam Brownback | Yosemite Sam | Fort Sam Houston | Sam's Club | Sam Peckinpah | Sam Mendes | Sam Waterston | Sam Worthington | Sam & Dave | Sam Taylor-Wood | Sam Houston State University | Sam Kelly | Sam Bush | Sam Zell | Sam Spade | Sam Milby | Sam Wood | Sam Wanamaker | Sam Walton | Sam Snead | Sam Rockwell | Sam Phillips (singer) | Sam Malin |
He acted as a replacement for actor Sam J. Jones, who had been forced to pull out after a shoulder injury.
In 1987, he played the lead role in an adaptation of Will Eisner's comics character The Spirit.
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He is best known for playing the title character in the 1980 film Flash Gordon.
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His appearance in 10 allowed Jones to beat out actors such as Kurt Russell and Arnold Schwarzenegger to his most famous role to date, that of Flash Gordon in the 1980 film of the same name.
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In 2007, he had a special guest role as the prisoner Krebb in the Sci Fi Channel original television series Flash Gordon.
McAllister later served as the head coach of the Florida Gators men's basketball team of the University of Florida in Gainesville, Florida, from 1937 to 1942 and again from 1946 to 1951, leading the Gators to an overall record of 119–96 in ten seasons.