Michael "Buster" Millerick was born in Petaluma, California. He learned to train horses at his cousin's ranch in Schellville where Larson Family Winery is located today. The Millerick family raised horses, ran the largest rodeo stock line in California and operated a rodeo. Buster's uncles Tom, Jack and George also trained thoroughbred racehorses.
Buster Millerick began working as a professional trainer while in his twenties. Shortly after Santa Anita Park opened in Arcadia, California in 1934, Millerick was hired to condition horses for Charles Howard and would work under head trainer Tom Smith when the stable acquired Seabiscuit in 1936. In 1940, Millerick won his first major race for the Howard stable when Yankee Dandy captured the California Breeders' Champion Stakes.
Buster Millerick avoided the limelight as much as possible. In a July 2005 story on Native Diver, the California Thoroughbred Breeders Association quotes stable owner and Millerick client Louis K. Shapiro as saying that "you never saw him [Millerick] in a winner's circle photograph." 
During his career, Buster Millerick trained a number of racehorses including DeCourcy Graham's Kissin' George and Verne Winchell's Champion filly, Mira Femme. He was the trainer of Mr. & Mrs. Louis K. Shapiro's U.S. Racing Hall of Fame inductee, Native Diver. A gelding, Native Diver won thirty-four stakes races from age two through age eight, including a three straight editions of the Hollywood Gold Cup, and was the first California-bred to earn a million dollars in racing.
Death and legacy
- wildwest.html Larson Family Winery Archived 2012-03-10 at the Wayback Machine
- Hillenbrand, Laura. Seabiscuit: An American Legend, p. 17 (2003) Random House ISBN 978-0-375-50291-0
- CTBA article on Native Diver and Buster Millerick (ctba.com/05magazine/jul/NativeDiver.pdf)
- Daily News of Los Angeles - October 2, 1986
- ESPN - June 9, 2010