CHICAGO (FOX 32 News) - South Side baseball fans may consider it a prank. North Side baseball fans might call it sabotage.
Cubs and Sox fans are currently reacting to a picture that surfaced on Twitter over the weekend that allegedly shows a White Sox cap being secretly buried in concrete at Wrigley Field by a Sox fan construction worker.
There’s an army of construction workers at Wrigley Field, still, as the landmark ballpark continues its $350-million dollar renovation.
But is there a traitor in their midst?
On Sunday, sports blogger Allison Horne tweeted a photo with the caption: "met a White Sox fan today that worked on the Cubs recent renovations he buried a hat in the cement there."
Not just any hat, a 2005 White Sox World Series championship hat.
The post doesn't say where or when the hat was buried, but Horne told FOX 32 that she knows the photo is legit.
FOX 32 showed the tweet to Cubs fans outside Wrigley.
"A true Cubs fan, it would bother them a lot," a woman said.
FOX 32: Would it bother you?
"Yes," the woman responded. "Because it's Cubs and Sox. It's a rivalry. This is our stadium and there shouldn't be any Sox stuff in there."
"Shows maybe a little bit of jealousy also," one man said.
"I think they should retaliate somehow, the Cubs. They need to do something," another man added.
A spokesman for the Cubs says they won't do anything because they doubt the picture is legit.
Cubs President Theo Epstein was more to the point when FOX 32 asked him about the cap controversy as he walked past the park. He told me--quote: 'I couldn't give two....'
Well, I can't say that word but it rhymes with hits.
It wouldn't be the first time this sort of thing has happened.
In 2008, the New York Yankees dug out a Boston Red Sox David Ortiz jersey that had been buried under a foot and a half of concrete by a Red Sox fan working on the new Yankee stadium.
It later raised $175-thousand dollars at auction for charity.
But if this was an attempt to razz Cubs fans, most of them say it didn't work.
"I think that's hilarious," a man said.
FOX 32: And you're a Cubs fan?
"Yeah I'm a big Cubs fan and I get a kick out of that," he said.
"I don't care. I'm not superstitious so it wouldn't bother me," another man said.
"It might break the curse of the Billy Goat, hopefully," a Cubs fan said.
FOX 32: So an anti-curse?
"An anti-curse, yeah," he responded.
FOX 32: Two curses canceling each other out.
"Exactly. And it might curse the Sox in the end," he added.