According to Wikipedia,
Donald Mounger Collier was an American actor best known for Western films and NBC television shows such as The High Chaparral, Bonanza, Gunsmoke, and Outlaws as Marshal Will Foreman. Early years Collier was born on October 17, 1928, in Santa Monica, California. He worked as a geologist, a logging hand, a ranch hand, and a surveyor and served in both the Navy and the Merchant Marine. After his naval service, Collier worked as an extra in a few films before attending Hardin–Simmons College on an athletic scholarship. He did not return to school after his freshman year, but he later studied geology at Brigham Young University.
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