And, the Nats are the only team with 98 wins. Best record through and through. Best Run Differential. Most complete team in baseball right here.
Nats were tied for third in OPS+ and second in ERA+. So, third best offense and second best pitching in the NL.
Giants (when you include Melky) and Cards were tied for first in OPS+ but were around league average in pitching. Barves had league average hitting but were just behind the Nats in pitching.
http://www.baseball-reference.com/leagues/NL/2012.shtml
