Comparative dates on which the Nationals notched their 90th win, each season:.
2017 - 17th September (149th match of season)
2012 - 18th September (147th match)
2014 - 20th September (154th match)
2016 - 24th September (154nd match)
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2013 - finished 86-76
2015 - finished 83-79
2005 - finished 81-81
2011 - finished 80-81
2007 - finished 73-89
2006 - finished 71-91
2010 - finished 69-93
2008 - finished 59-102
2009 - finished 59-103