If you go look at Mike Tyson’s boxrec page, from March 6, 1985 to December 27, 1985, he fought 15 times.
I’m not sure when this trend started slowing down but it wasn’t long ago that boxers fought frequently.
I’m sure once you become a champion things slow down.
@krackdagawd could you speak on this?
Tyson was a youngster establishing himself at the time. Even in modern times, fighters fight much more frequently when they are trying to build a record. Once they become contenders/champions and face top competition in each fight, they fight only a few times each year. That was true even of Tyson.
What was remarkable about SRR and other oldtimers was that they fought frequently even while facing top competition.