Guillen and Jacobs went nose-to-nose outside the club's Seattle hotel after getting off the team bus on Wednesday night. Witnesses said they were arguing and were separated by teammates Miguel Olivo and Brayan Pena. There was a brief scuffle and witnesses said mediators Olivo and Pena were on the receiving end of errant blows.
Things quieted down immediately and the team entered the hotel without further incident.
"Just a misunderstanding. Obviously you don't want to have misunderstandings with a teammate but sometimes you do," Jacobs said. "It's OK. We kissed and made up."
Guillen, on the disabled list but traveling with the club, did not want to discuss the matter.
"Stuff happens," Guillen said. "We deal with that as professionals."
Manager Trey Hillman, who had already entered the hotel, declined to comment as did Olivo. Pena acknowledged getting in the middle of things.
"I was a peacemaker," he said.
Jacobs said he considered the incident with Guillen closed.
"We're all good. He's probably one of the closest guys on this team -- me and him are pretty close to each other," Jacobs said. "I chalk it up to one of those things like a misunderstanding with a brother or something like that. We're obviously spending seven, eight months out of the year with each other now."
All seemed serene in the Royals' clubhouse before Thursday night's game against the Mariners.
"No big deal," Jacobs said.
Dick Kaegel is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.