All of which brings Todd's pop to mind.
In 1968, Cubs catcher Randy Hundley caught 160 games. He was the starting catcher in 156 of those, caught a CG 146 times (which included 10 extra inning games totaling 24 extra innings) and in those ten games where he was removed prior to the final out seven of the ten came in the 8th or 9th innings* so he played close to a full game.
Hundley caught 149, 152, 160, and then 151 games for four straight seasons but then never topped 125 again. Not sure if the team was learning any lessons or whether they just plumb wore the boy out. The 441 total games he played over the final eight years of his career were nearly 40% fewer than his total for the four preceding years.
* also was removed once in the 4th inning (at Shea immediately following a Ron Swoboda steal of home so probably there was a collision); once in the 6th (in Wrigley with Cubs getting blown out by StL in mid-August); and once in the 7th (down 5 - 1 in Atlanta also in August).
At least the equipment was lighter back then ... oh, no it wasn't. But at least he could DH now and then ... oh wait, no he couldn't. And at least he didn't have to play 81 home games during the day in the heat of a Chicago summer ...