It took a while -- right around two weeks to be exact -- but the Washington Nationals are back in the winner's circle when it comes to securing a series victory. Following their rare sweep over the Milwaukee Brewers that took place from April 10-12, the Nationals split with the Pittsburgh Pirates in their following set and then dropped two in a row against the and San Francisco Giants and Atlanta Braves. While the Chicago White Sox aren't exactly playoff contenders at this stage of the season, taking two out of three from them was a positive for Washington. And as this series took place, three things stood out. Foster Griffin Is This Team's Ace Washington Nationals pitcher Foster Griffin | David Banks-Imagn Images When Foster Griffin was signed , not much was made of the addition. Brought over after he spent three seasons in Japan playing Nippon Professional Baseball, the left-hander has been a revelation for the Nationals to start the year.…