A stir was created after Guillen took issue with Harper showing a bat that didn't have much pine tar on it in the fourth inning at Marlins Park.
The story received plenty of attention as Guillen felt he was being shown up, and Nationals manager Davey Johnson felt the Marlins manager was trying to intimidate his player.
During the feud, several Washington players pulled a prank. Adam LaRoche had Harper sign a bat for him. Harper didn't know the purpose, but it's common for players to get autographs from each other.
From there, LaRoche added next to the signature, "To my hero, Ozzie, love you."
The Nationals players had the bat smeared with pine tar and sent it to Guillen.
"It was funny," Guillen said. "I've got a few friends on their side. All those guys were making fun of me. I found out later they made the kid sign the bat. They put the rest. 'To my hero, Ozzie, love you.'"
From his playing days with the White Sox, Guillen remembers seeing LaRoche as a young child. LaRoche's father, Dave, formerly pitched in Chicago.
Guillen noted that he remains a fan of Harper, and he considers the pine-tar issue over.
"To make this thing clear, I don't have anything against the kid," Guillen said. "I don't. Whatever happened, happened. Whatever I say, I say. Whatever my reaction was, it was. But I think this kid is going to be good for the game. No doubt. This kid is very good. We need players like that to come out and play the game right. That's good. I think what he did, maybe he did because he's a kid. I hope he learned from that.
"His manager said I was trying to intimidate him. I wasn't. That was the last thing on my mind. I hope he learned from that and moved on."