Giants waste Logan Webb’s gem, swept by Marlins to fall 15 games below .500

MIAMI — In a series where hardly anything has gone right, the Giants still had to feel good about their chances Sunday with their ace, Logan Webb, on the mound.

The odds were even more in their favor given the Marlins countered with Ryan Gusto, a 27-year-old from Santa Rosa with a 5.85 ERA in...