"My guess is he's going to be pretty sore," Bochy said.
Actually, "sore" was Sandoval's one-word description of his condition as he left Petco Park's visitors' clubhouse.
Batting left-handed against the right-handed Despaigne, Sandoval swung at an 0-1 slider that broke toward him and hit him on the left forearm near the elbow. Bochy and head athletic trainer Dave Groeschner examined Sandoval, who was in obvious pain. Sandoval remained in the game for one more pitch, as Brandon Belt was thrown out on a stolen-base attempt to end the inning.
Joaquin Arias replaced Sandoval when the Giants took the field for the Padres' half of the inning.
Chris Haft is a reporter for MLB.com. Read his blog, Haft-Baked Ideas, and follow him on Twitter at @sfgiantsbeat. This story was not subject to the approval of Major League Baseball or its clubs.