An estimated 23.5 million people watched the Giants’ 3-2 win over the Kansas City Royals in Game 7 on Wednesday night, enabling the matchup to escape the distinction of least-watched World Series. The Series’ overall average of 13.8 million viewers was second only to the Giants’ four-game sweep of the Detroit Tigers in 2012 as the smallest for baseball’s biggest games. [...] Game 7 was filled with drama, as the Giants clung to their one-run lead behind the masterful performance of Bumgarner in relief.