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You forgot to check STRAND RATE, Doc. E-F is not JUST park and defense...it's also sometimes strand rate luck and bullpen quality. Tampa Bay (0.01 E-F, pretty shoddy bullpen, below average success stranding runners, well above average defense) demostrates my point here.
So does Seattle (which likely pitched into some good luck on bullpen strand rates this year and that may revert some unless we add some legit relief weapons).
I don't think Seattle's park and defense deducted half a run per game. I do think Seattle's park deducted about 0.2 runs to 81 of their games and their defense deducted another 0.25 runs per game (all 162 of them) and they had some good fortune in their reliever appearances helping them out too.