I just wanna stick up for some older (not weak) veterans of umpiring.
yesterday, I saw an older veteran call a hella game from the dish. he has knee issues, I heard from beating some kinda cancer. he also has an ankle issue, since his weakened knees cause him to turn his one of his ankles.
the fella moved somewhat gingerly, but was still moving briskly enuff w/ a slight limp, got into positions when necessary, and didn't see him once cheat his stance. he did all this with a big smile on his face before, between innings and after the game.
if I can do what he's doing when I'm his age, I will feel very fortunate. sometimes, there are excuses, and I think this one is a good one as any.