C - Buster Posey, San Francisco Giants

Season Stats: .331/.413/.510 (146 OPS+), 10 HR, 35 RBI, 2.9 WAR

The NL's elected starter has rebounded from an off-only-by-his-standards season with the bat and is the clear choice here, with an 0.8 WAR advantage over Yasmani Grandal in both flavors of 2017 WAR, and a 0.8 bWAR/1.2 fWAR advantage over Willson Contreras. Since the start of last year, his 7.5 bWAR is at least 50% higher than any other catcher in baseball.

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