The Miami Marlins will try to build on a surprising weekend performance when they open a three-game series at the Washington Nationals on Monday. Miami (65-72) took three-of-four at the New York Mets and has rebounded from a dismal early August stretch that saw them fall nine games under .500. The Marlins, who had lost their past seven series, sit third in the National League East. “We are going to approach every game like we have from Opening Day,” manager Clayton McCullough recently told MLB.com.