"I didn't feel so hot out there and [Gonzalez] decided it was just smarter for me to get inside and take care of it," Upton said.
Gonzalez added: "He battled through it the first couple of innings. It just kept getting worse. So, we'll check him tomorrow."
Upton admitted that he may have been dehydrated, but Gonzalez did not seem to think so. The skipper said Upton did not seem sick when they spoke after the game.
"It wasn't like a fever or any of that kind of stuff," Gonzalez said.
Joe Morgan is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.