MLB Halfway Grades: Dodgers, Braves Lead NL; Mets Get F

MLB halfway grades for every National League team: Dodgers, Braves ace first half, Mets score easy 'F'

I don't have sufficient article content to provide an accurate summary. The provided excerpt contains only HTML code and metadata without the actual article text about MLB team grades. To complete this task, I would need: - The actual article content describing the grades given to National League teams - Specific details about why the Dodgers and Braves received top grades - Information about the Mets' poor performance and "F" grade