Comparative dates on which the Nationals notched their 18th win, each season:
2012 - 5th May (27th match of season)
2005 - 9th May (32nd match)
2010 - 10th May (32nd match)
2011 - 11th May (36th match)
2008 - 15th May (42nd match)
2007 - 23rd May (47th match)
2006 - 24th May (47th match)
2009 - 17th June (64th match)
Just curious, so, as Casey suggested, I looked it up. This team is pretty much keeping pace with the 1925 Nats, who won for the 18th time in their 26th game, beating Cleveland 6 - 2 as Walter Johnson, all 37 years of him, won his 5th game. Hitting star was Goose Goslin with 2 RBIs, but we can't overlook Johnson, who went 2-for-4...was then batting .429, and would be used several times as a pinch-hitter that season. Note: the '25 Nats had not had serious injuries, so I'd say that today's team might be ahead of the '25 pennant-winners.
Not that it means anything...yet.