Bryce Harper left Saturday night’s game against the Giants after six innings and three at-bats with what he and Manager Dusty Baker called a “stiff neck,” an issue that has been bothering the Nationals right fielder for a few days now.

“Anybody who has ever had a stiff neck, I mean, you know you’re not yourself,” Baker said. “So I took him out for precaution. We’ll see if it’s any better tomorrow.”

Harper struck out three times in the game. During his second at-bat, Harper fouled a pitch back and then grimaced in pain, paused, and bent over with the bat on his knees. He took so long before stepping back in that trainer Paul Lessard came out to check on him.

“It just didn’t feel very good. It got a little tense in there. I needed a break real quick,” Harper said. “Our trainer got out there and gave me a second. Just definitely didn’t feel right. Hopefully we can see what tomorrow has in store for us.”

Harper stayed in the game for three more innings, the last of which included a twirling sprint to the right field wall during a Joe Panik fly ball. Harper caught the ball, but did not seem to see it the way he normally does — hence the circuitous route.

“I think it’s an all-around thing,” said Harper, asked when he feels the trouble most.” Just coming in here today, I tried to free it up a little bit more. It didn’t happen very much, but I felt good enough to go. Unfortunately, I want to be in that lineup every night. It was just tough right there.”

Baker said Harper will be reevaluated Sunday morning. Harper said he did not know the origin of the trouble.

“I don’t know man, a pillow?” he said. “I really have no idea.”