[...]Or, when was the last time they had a winning percentage of .750 with a minimum of 15 games (or ever LOL)? Just curious?
Of the post-relocation Nats teams, only the 2008 and 2012 editions - the only ones ever to win their season openers - have played .750 or better ball from the start of the season. The 2008 edition won its first three and a loss to the Phillies on 3rd April put them at exactly .750 - but that loss was the start of a 9-match losing streak and put paid to any further hopes of that sort of percentage.