KANSAS CITY -- Setup man Joe Kelly left the Red Sox's 15-4 win over the Royals with two outs in the eighth inning because he felt lightheaded.

Manager Alex Cora and the trainer visited the mound after Kelly recorded the first two outs. He struck out Alex Gordon swinging and then retired Adalberto Mondesi on a groundout to first base.

"Lightheaded," Cora said. "We don't want to take any chances. So we took him out of the game. He checked out with the trainers. Probably see the doctors later on and go from there. Hopefully it's nothing serious."

Brandon Workman replaced Kelly and retired Whit Merrifield on a grounder to shortstop to end the eighth.