Lester labored in the first, throwing 32 pitches and giving up a run. Plate umpire Doug Eddings called time just as Lester was starting to throw a pitch to Chase Headley. It hit him on the foot, but was waved off. Headley then proceeded to have a 10-pitch at-bat, reaching on a single. Kyle Blanks followed with an RBI single to center.
Boston tied it 1-1 when Carp singled leading off the fourth and scored when left fielder Quentin misplayed a carom off the Green Monster on Saltalamacchia's double.
Lester eventually settled down, retiring the Padres in order on just five pitches in the second. He gave up a hit, but needed only 12 in the third.
Volquez struck out the side in the second after allowing Carp's leadoff single.
Both dugouts were warned by Eddings after Volquez hit Jose Iglesias with the first pitch in the third inning.
"Every run that the bullpen gives up, it's magnified. Or anytime a bullpen does a good job it's magnified in the positive," Black said. "It's a tough role because at either time it's goat or hero. That's what makes this game great and exciting and emotional all at one time."
NOTES: Red Sox RHP Clay Buchholz, on the 15-day since June 9 with a neck strain, threw from flat ground at about 100 feet. Buchholz was 9-0 with a 1.71 ERA before the injury. ... The Padres made a lineup change about three hours before the game, moving Quentin from DH to left field and Blanks from left to DH. ... Red Sox manager John Farrell gave 1B Mike Napoli a rest and inserted Carp at first, batting him sixth. .Quentin was 0 for 11 in his career against Lester. ... Boston SS Iglesias was named AL rookie of the month for June, the first Red Sox player to win it since Jacoby Ellsbury did it in Sept. 2007. Iglesias hit .395 in 25 games. ... Game time temperature was 87 degrees with a steamy feeling in Fenway.