Hall of Famer Jim Thome?
Fangraphs' list of all-time difference in high to med/low leverage w/RC+ includes seasons by Craig Biggio, Hideki Matsui, Jim Thome, David Wright, and Ryan Zimmerman.IOW, not sure why anyone should be hung up on this one stat for one season.
Dave Cameron pegged him as a LH Mike Napoli on Fangraphs a few years ago. That’s looking pretty accurate. If you take out Napoli’s huge (and uncharacteristic) 2001 season where he hit .320/.414/.631, I bet their career slash lines would be almost identical.
As long as Schwarber doesn’t devolved a degenerative hip condition would that really be a bad thing? Schwarber is also a lot better on defense than Cameron gave him credit for.