BOSTON — Red Sox reliever Erik Miller mowed down his former teammates Friday. The 28-year-old struck out two Giants batters in a perfect seventh inning, just 18 days after Boston acquired him from San Francisco for Marcelo Mayer.

The Boston Red Sox (68-59) open a three-game series against the San Francisco Giants (52-75) tonight at Fenway Park. Boston enters the weekend in control of the second Wild Card position in the American League. The Giants are riding out a disappointing season. Only the Rockies have fewer wins on the campaign than San Francisco’s 52.

The Boston Red Sox have another big series coming up over the weekend against the San Francisco Giants.

BOSTON — Red Sox rookie Alec Gamboa wasn’t expecting to pitch the eighth inning Friday. After all, he had never before pitched in a high-leverage spot in the major leagues. But when the bullpen phone rang with Boston ahead by two runs,