Dude, it was a 54 game season for JD (237 PAs), and you jumped at it like it was the only evidence that mattered.
You are the one who uses age more than anyone I know.
You use LeMahieu's 50 game sample size as if it is everything.
I'm not doubting he can hit .300 in 2022, but in the overall sense of his age-related trend, he should continue declining- NOT from his 2021 numbers but in the context of his bell curve by age.
OPS by age:
.663 at 25
.746 at 26
.911 at 27 (could be viewed as an outlier)
.783 at 28 (He had an .824 stretch in a 339 PA stretch.)
.749 at 29 (He had an .809 stretch in 163 PA stretch.)
.893 at 30 (might show maybe 2016 was not an outlier)
1.011 at 31 in just 216 PAs (Seeing what he did is similar stretches at age 28 & 29, one wonders if this was sustainable over 600 PAs)
.711 at age 32 (2nd largest sample size season of his career)
Let's look at 2 season samples:
.667 '13-'14
.828 '15-'16
.767 '17-'18
.922 '19-'20 (.831 '19-'21)
Jump 2013:
.708 '14-'15
.844 '16-'17
.825 '18-'19
.784 '20-'21
(This one looks more like a typical bell curve.)
I'd expect something like .790 to .850 in 2022, assuming he's healthy, and more likely near .840.
JD is less than a year older than LeMahieu, and I'd be interested to know what you project for him, next year.
JD's 2 year numbers:
.893 '14-'15
.985 '16-'17
.985 '18-'19
.816 '20-'21
(To me, his curve seems tighter and more to form- more predictable, perhaps.)
I'd expect something between .800 and .880 for JD, next year but likely closer to.870.