It's not the bible, butb when DRS and UZR/150 bot point to JBJ not being a top 10 defensive CF'er during a pretty long sample size of the down slope of his prime years, it leads me to think there are some equal or better CF'ers in MLB, right now. Several cost way less, although their offense has been even worse than JBJ's ups and long downs.
I love defense. I love watching great defense more than great offense. JBJ has been my favorite Sox player since before he was even a starter. Defense up the middle is not over rated in my book.
That being said, I have seen other CF'ers that look as good or better than JBJ is, right now in his career. The numbers back up my observations, for the most part, but they are not perfect indicators of value.
Now, to JBJ's offense. Just as I defended JBJ's offense during slumps, I'm not fooled into thinking he has suddenly become a consistently very good hitter due to this shortened system. Overall, he'snot very good, and he's not very bad, except in short sample sizes focusing ob his hot and cold streaks.
From 2018-2020, his OPS is about .742. Would I bet on the over on .742 the next two to three years? No. I wouldn't feel comfortable betting the under, but if I had to choose, I would. BTW, .742 ranks 21st out of 32 CF'ers with 900+ PAs. It's very close to:
.755 Cain
.730 A Jones
.727 Pillar
It also makes me wonder about guys like these, who are worse hitters but by how much? And, does their apparent better defense cancel out JBJ's better offense? Then, what about their contract cost and how the "saved money" could be spent elsewhere to offset any possible loss in CF by signing or trading for...
.688 Inciarte
.682 Margot
.669 Kiermaier
or even a guy like Marisnik.
I'm fine with bringing JBJ back. He'd still be my favorite Sox player, but the more we spend on CF, the less we have for other more pressing needs.