Offense punchless again as Cubs swept by Brewers at Wrigley

Nothing but sour notes in Wrigley Field on the home side this week?Does it count that Cubs organist Ryan Langhoff played a rendition of Gershwin’s “Rhapsody in Blue” that was concert-hall worthy? Or that an a cappella group from Northwestern, Thunk, crushed the anthem one night, and Mariachi Herencia de Mexico did so the next?Oh, you were thinking something more along the lines of singing “Go, Cubs, Go,” the victory ditty that before this week rocked Wrigley Field on 15 consecutive dates?Sorry,...