This year's World Series between the Washington Nationals and Houston Astros went the distance but finished as the third-least viewed. The series averaged 13.91 million viewers according to national numbers from Nielsen, which is down 1.3% from last year, when the Boston Red Sox defeated the Dodgers in five games (14.1 million average). The Nationals' first title had an 8.1 overall rating and 16 market share.