Fireman Jim Flynn was the first... but who was the last?

Yes, yet another club-member!

 

I actually thought this was a very difficult question, and that possibly no one would get it - so well done!

Yocupicio of course continued his streak into 2022 - making it 28 years in a row, just like Danny Williams, as you correctly point out.

Incidentally, If Yocupiciohe hadn't missed 1994, his total would now be 30 years in a row - enough to tie in 2nd place on this particular All-Time list with Luis Ramon Campas and Roy Jones Jr. As Jason Thomas mentioned, Kid Azteca had 33 consecutive years - a clear #1 on the list!

Again, great job!

 

Hopkins actually makes the list with 25 calendar years in a row (1990-2014).

 

Interresting... I will definitely keep an eye on him!

If he makes it, he'll be the 23rd boxer on my list - which so far looks like this:

Kid Azteca, 33 years (1929 - 1961)
Luis Ramon Campas, 30 years (1987-2016)
Roy Jones jr., 30 years (1989 - 2018)
Archie Moore, 29 years (1935 - 1963)
Cosme Riveria Yocupicio, 28 years (1995 - 2022)
Danny Williams, 28 years (1995 - 2022)
Jim Flynn, 27 years (1899 - 1925)
Jack Britton, 27 years (1904 - 1930)
Jerry Strickland, 27 years (1974 - 2000)
Saoul Mamby, 26 years (1969 - 1994)
Joe Brown, 26 years (1945 - 1970)
Baby Vasquez, 26 years (1949 - 1974)
Juan Polo Perez, 26 years (1982 - 2007)
Lee Cargle, 26 years (1982 - 2007)
Yoshinori Nishizawa, 26 years (1986 - 2011)
Silvio Branco, 26 years (1988-2013)
Sam Langford, 25 years (1902 - 1926)
Mike Weaver, 25 years (1972 - 1996)
Jorge Vaca, 25 years (1978 - 2002)
Jose Luis Castillo, 25 years (1990 - 2014)
Bernard Hopkins, 25 years (1990 - 2014)
Manny Pacquiao, 25 years (1995 - 2019)

If I have missed someone, who should be on the list - I'd be interested to know!