SAN FRANCISCO—If the Dodgers and Giants just provided a glimpse of a possible playoff series, an October matchup between these rivals could be one for the ages. “I can imagine that would be the most intense postseason series I’ve ever been a part of,” San Francisco first baseman Brandon Belt said. The September showdown wasn’t half bad, either. Steven Duggar hit a two-run triple after being called up earlier in the day, Belt homered, and the Giants wrapped up a key weekend series against Los Angeles with a 6-4 win on Sept. 5 to take a narrow NL West lead again. San Francisco did it with a second straight bullpen game, and did it watching Albert Pujols launch another home run at age 41. “It’s just no flinch, up and down the lineup, the bullpen,” Duggar said. “Just go about our preparation and every guy pulls their weight. It’s just …