The U.S. attorney's office says 58-year-old William Turner was sentenced Monday. He pleaded guilty last fall to six holdups but investigators believe he was responsible for 33 others.
Authorities gave Turner his nickname for the fishing hats, fedoras and baseball caps he wore.
In 1992, Turner was sentenced to 15 years in prison for another series of bank robberies in downtown Los Angeles that earned him the nickname the "Pershing Square Bandit."
Authorities say Turner was on supervised release in that case when he was arrested for new holdups two years ago.