The Giants made two outs after Scutaro’s single, but they kicked their offense in gear, starting with a Hunter Pence single to right field, which sent Scutaro scampering to third.
Scutaro scored on former Red Sox draft pick Brandon Belt’s single to center and two runs came in on Gregor Blanco’s triple to right-center.
Brandon Crawford continued the rally with a double to right to score the fourth Giants run.
Nick Cafardo can be reached at email@example.com. Follow him on Twitter @nickcafardo.