Cubs’ surprise closer Jacob Webb finally falters, but bullpen in good spot as big playoff moments loom

SEATTLE – Jacob Webb has learned something about this sport. “In baseball,” the Cubs’ closer said before Saturday’s game, “you’ve got to expect the unexpected sometimes.” Indeed, his season counts as unexpected. The Cubs signed the righty reliever to a one-year free-agent deal worth $1.5 million last offseason, bringing him in to be a piece of their bullpen puzzle. But not the piece. That’s what he’s been, though, the team’s go-to reliever, bringing a 24-appearance scoreless streak into…