Jules Tibbets
Retires "undefeated" (San Francisco Call Bulletin, 1904-01-23).
Edward Kolb
Succeeds Tibbets as the champion (San Francisco Call Bulletin, 1904-01-23).
Ad Santel (Adolph Ernst)	1915-09-22<
Still champion as of 17-05-08.
Karl Sarpolis	1932-08-08<
Billed as champion in Reno, NV.
Bob Kruse	1932-12-10<
Still claims the title in Oakland, CA as of 33-05-02.
[...]
George Zarynoff	1934-05-06<
Claims the title in Oakland, CA.
[...]
Bob Kruse [2]	1934-09-10<
Billed as champion in Fresno, CA; still champion as of 34-09-28.
Jack Ganson	1934-02
Former champion as of 34-02-06 and the current champion as of 34-02-18 (San Francisco Chronicle); also billed as California champion as of 34-05-28; still Pacific Coast champion as of 34-07-23.
[...]
Ray Steele	1934-10-21<
Also billed as California champion.
Joe Malcewicz	1934-12-04	San Francisco, CA
Also billed as California champion.
Lufty Bloomfield (Lofty Blomfield)	1935-04-03	Visalia, CA
Joe Savoldi *	1935-04?
"A few weeks" after Bloomfield wins the title (Auckland Star, Auckland, NZL, 35-06-15); no results found on the local papers.
[...]
Joe Malcewicz [2]	1935-06-28<
Cy Williams *	1935-10-16	Reno, NV
Unclear whether this is a title match or not; Malcewicz is listed as champion on the day of the match but listed as former champion on next day.
[...]
Hardy Kruskamp	1936-04-21<
Claims the title in San Francisco, CA.
[...]
Vacant as of 36-10.
Billy Hanson	1936-11-03	San Francisco, CA
Defeats Nick Lutze in tournament final.
Sandor Szabo	1937-01-22	Oakland, CA
Vincent Lopez	1937-06-29	San Francisco, CA
In Fresno, CA, Pat Fraley is billed as champion in 37-08 and 37-09 for defeating Sandor Szabo in San Francisco, CA (possibly for the match on 37-08-03).
Sandor Szabo [2]	1937-09-28	San Francisco, CA
Cy Williams	1937-12-07	San Francisco, CA
Sandor Szabo [3]	1938-02-01	San Francisco, CA
Ivan Rasputin	1938-02-11	Oakland, CA
Vacant in 38-05 when Rasputin leaves the area.
Sandor Szabo [4]	1938-06-07	San Francisco, CA
Defeats the Purple Shadow (Bill Longson) in tournament final.
Bill Longson	1938-11-15	San Francisco, CA
Sandor Szabo [5]	1938-11-29	San Francisco, CA
Lou Plummer	1939-02-02	Salinas, CA
Dean Detton	1939-03-07	San Francisco, CA
Vacant in 39-06 when Detton leaves the area.
Lee Henning	1939-06-27	San Francisco, CA
Defeats Carl Davis in tournament final.
Sandor Szabo [6]	1939-07-25	San Francisco, CA
Pantaleon Manlapig	1940-01-25	Salinas, CA
Sandor Szabo [7]	1940-02-01	Salinas, CA
Ray Villmer	1940-05-28	San Francisco, CA
Pantaleon Manlapig [2]	1940-07-11	Salinas, CA
Max Krauser *	1940-09-27	Fresno, CA
Bobby Managoff *	1940-10-11	Fresno, CA
Ivan Rasputin *	1940-11-01	Fresno, CA
Pantaleon Manlapig *	1940-11
Title changes between 40-09 and 40-11 above may be recognized only in Fresno, CA, where Rasputin is no longer mentioned for the rest of the year.
Bobby Managoff	1940-12-27	San Francisco, CA
Ivan Rasputin [2]	1941-01-07	San Francisco, CA
Bobby Managoff [2]	1941-01-28	San Francisco, CA
Black Panther (Frank Sexton)	1941-03-21	Oakland, CA
Bobby Managoff [3]	1941-06-03	San Francisco, CA
Bill Longson [2]	1941-06-10	San Francisco, CA
Frank Sexton [2]	1941-07-08	San Francisco, CA
Bill Longson [3]	1941-07-30	San Jose, CA
Frank Sexton [3]	1941-08-26	San Francisco, CA
Jim Casey	1941-10-07	San Francisco, CA
Frank Sexton [4]	1941-11-04	San Francisco, CA
Dean Detton [2]	1943-10-12	San Francisco, CA
Green Phantom (Pat Fraley)	1944-01-26	San Jose, CA
Dean Detton [3]	1944-03-03	Oakland, CA
Sandor Szabo [8]	1944-08-23	San Jose, CA
Dean Detton [4]	1944-09-06	San Jose, CA
George Koverly	1944-10-06	Oakland, CA
Dean Detton [5]	1944-10-17	San Francisco, CA
George Koverly [2]	1944-11-04	Oakland, CA
Dean Detton [6]	1944-12-01	Oakland, CA
Vincent Lopez [2]	1945-02-24	Fresno, CA
Dean Detton [7]	1945-03-03	Fresno, CA
Vincent Lopez [3]	1945-03-16	Oakland, CA
Jim Casey [2]	1945-03-20?	San Francisco, CA?
Dean Detton [8]	1945-04-06	Oakland, CA
Earl McCready	1945-04-11	San Jose, CA
Dean Detton [9]	1945-06-08	Oakland, CA
Billy Hanson [2]	1945-08-10	Oakland, CA
George Koverly [3]	1945-09-07	Oakland, CA
Dean Detton [10]	1945-09-14	Oakland, CA
Jim Casey [3]	1946-01-08	San Francisco, CA
Rebel Russell	1946-02-20	Los Angeles, CA
Loses to George Becker in Los Angeles, CA on 46-05-01 but continues to be billed as champion in San Francisco.
Sandor Szabo [9]	1946-06-04	San Francisco, CA
Bronko Nagurski	1946-10-22	San Francisco, CA
Billy Hanson [3]	1946-11-02	Fresno, CA
Dutch Hefner	1947-01-11	Fresno, CA
Billy Hanson [4]	1947-01-18	Fresno, CA
George Koverly	1947-03-28	Oakland, CA
Billy Hanson [5]	1947-03-14	Oakland, CA
Ray Eckert	1948-01-13	San Francisco, CA
Billy Hanson [6]	1948-02-24	San Francisco, CA
Pat Fraley [2]	1948-03-27	Fresno, CA
Billy Hanson [7]	1948-04-03	Fresno, CA
Ray Eckert [2]	1948-04-07	San Jose, CA
Len Hall	1948-05-25	San Francisco, CA
Billy Hanson [8]	1948-08-06	Oakland, CA
Len Hall [2]	1948-08-13	Oakland, CA
Bronko Nagurski [2]	1948-10-01	Oakland, CA
Sandor Szabo [10]	1948-10-29	Oakland, CA
Lee Henning [4]	1949-01-25	San Francisco, CA
Gino Garibaldi	1949-03-29	San Francisco, CA
Sandor Szabo [11]	1949-07-19	San Francisco, CA
Lee Henning [5]	1949-08-02	San Francisco, CA
Gino Garibaldi [2]	1949-09-06	San Francisco, CA
Ray Eckert [3]	1949-10-15	Fresno, CA
Sandor Szabo [12]	1950-01-10	San Francisco, CA
Ray Eckert [4]	1950-01-24	San Francisco, CA
Ron Etchison	1950-05-08	Sacramento, CA
Frederick von Schacht	1950-06-27	San Francisco, CA
Gino Garibaldi [3]	1950-09-26	Fresno, CA
Mike Sharpe	1950-10-10	San Francisco, CA
Sandor Szabo [13]	1951-05-08	San Francisco, CA
Hombre Montana	1951-10-30	San Francisco, CA
Ray Eckert [5]	1952-10-07	San Francisco, CA
Enrique Torres	1952-11-22	Fresno, CA
Ray Eckert [6]	1952-11-19	San Jose, CA
Enrique Torres [2]	1953-02-07	Fresno, CA
Ray Eckert [7]	1953-04-18	Fresno, CA
Enrique Torres [3]	1953-07-09	Stockton, CA
Danny Plechas	1954-02-27	Fresno, CA
Repeated on 54-03-04 in Stockton, CA.
Enrique Torres [4]	1954-03-06	Fresno, CA
Repeated on 54-03-11 in Stockton, CA.
Ben Sharpe	1956-01-28	Fresno, CA
Enrique Torres [5]	1956-02-11	Fresno, CA
Hombre Montana [3]	1957-03-23	Fresno, CA
Enrique Torres [6]	1957-03-29<
Still champion as of 57-06-03.
[...]
Mike Sharpe [2]	1957-08-01<
Ramon Torres	1957-10-21	Scramento, CA
Stan Kowalski	1958-05-10	Fresno, CA
Ramon Torres [2]	1958-05-17	Fresno, CA
Karl Von Schober	1958-06-21	Fresno, CA
Ramon Torres [3]	1958-07
Sometime before 58-07-14.
Red Hangman (Tom Rice)	1958-12-16	Santa Ana, CA
Ramon Torres [4]	1959-02-09	Scramento, CA
Ben Sharpe [2]	1959-03-20	Oakland, CA
Ramon Torres [5]	1959-04-10	Oakland, CA
Gene Dubuque	1959-05-04	Richmond, CA
Ramon Torres [6]	1959-05-18	Richmond, CA
Mike Sharpe [3]	1959-12-15	San Francisco, CA
Enrique Torres [7]	1960-01-16	Fresno, CA
Fred Blassie	1960-08-27	Fresno, CA
Enrique Torres [8]	1960-09-09	Oakland, CA
Vacates in 60 due to injury (sometime after 60-10-18).
[...]
Ramon Torres [7]	1961-01-12<
Mr. Kleen (Ed Miller)	1961-01-20	Santa Rosa, CA
[...]
Enrique Torres [9]	1961-07-27<
Sometime after 61-03-26.
Magnificent Maurice	1961-08-10<
Enrique Torres [10]	1961-09-12	San Francisco, CA
Magnificent Maurice [2]	1961-10-13	Santa Rosa, CA
Enrique Torres [11]	1961-10-27	Santa Rosa, CA
Still champion as of 61-12-12.