"It felt good at the time because it put us ahead," said Cespedes. "That happiness was short-lived because we didn't get the win today."
It was the third homer for Cespedes in the last five games. His first two were both rockets in the eighth inning that led the Red Sox to victory.
"Yeah, when he squares a ball up, as strong as he is, as much batspeed as he has, he's going to hit some balls hard," said Red Sox manager John Farrell. "It's been impressive what he's been able to do in the short time he's been here. But he's a strong guy with a good swing."
Ian Browne is a reporter for MLB.com. Read his blog, Brownie Points, and follow him on Twitter @IanMBrowne. This story was not subject to the approval of Major League Baseball or its clubs.