This whole Santana thing is weird. No he's not a good defender but he's also never been as bad as he's been this year. So did he just suddenly become the worst defender ever or is it a blip? I don't know the answer but I do know that last year Bryce Harper had a -10 DRS in 477 innings in CF while having a +13 DRS in his first 918 innings in CF and he had a +9 DRS in his first 4,000 innings in RF and then fell off to -16 in 860 innings in 2018. But this year he's come back and has been perfectly average in RF. So I don't really know why Santana has been so bad this year. Nagging injury, some sort of shift where the balls are hit just out of reach that others would be able to get that he can't but I would bet on him getting back to not good but passable defender than I would bet on him being unplayable dumpster fire.