William Dee Calhoun (August 3, 1934 – December 7, 1989) was an American professional wrestler, who used the professional name "Haystack" or "Haystacks" Calhoun. Born on August 3, 1934, William Dee Calhoun grew up on a farm in McKinney, Texas; a rural suburb located in Collin County about 30 miles (48 kilometers) north of Dallas.

By age 14, he already weighed 300 pounds (140 kilograms), as he routinely ate a dozen eggs for breakfast. By the time he was in his early 20s, Calhoun weighed over 600 pounds (270 kg). Legend has it that Calhoun was discovered by a traveling wrestling promoter that saw him pick up and move cows across a field.