Volpe’s tough year reached another low point in Saturday’s loss, when his throwing error opened the door for Boston’s seven-run ninth inning. It was his 17th error of the season, a number that feels all too familiar. He made 17 as a rookie and 16 last year. That’s not progress, that’s a problem.

The Boston Red Sox take aim at a four-game sweep in the New York Yankees’ house when they play the finale on “Sunday Night Baseball.”