This story was updated at 12:45 pm ET Friday.
Someone's hitting foul balls into Major League Baseball's team Facebook pages.
"We regret to inform our fans that Derek Jeter will miss the rest of the season with sexual reassignment surgery," read a message posted on the official page of the New York Yankees this afternoon (Aug. 2). "He promises to come back stronger than ever in 2013 as Minnie Mantlez."
The Yankees were far from the only team that had its Facebook page hacked, according to the sports blog Deadspin.
"We're going back to Montreal. SEE YA SUCKERS!!!!!!" read the message on the page of the Washington Nationals, who moved to the District of Columbia from the French Canadian metropolis a few years ago.
The message on the Facebook page of the Chicago Cubs was more blunt and graphic. It referred to a sexual act with actor Bill Murray, who threw the first pitch of the current season at Wrigley Field.
The Cubs quickly replaced that with an apology: "Our Facebook account was hacked moments ago and an inappropriate message was posted on this page. We apologize if you viewed this message. The team and league are looking into this false post in cooperation with Facebook."
Deadspin reported that the San Francisco Giants, Miami Marlins, San Diego Padres and Chicago White Sox also had their Facebook pages defaced with goofy, somewhat insulting messages.
We can't print them all here — go to Deadspin for the rest.
All the unauthorized messages were down by 5 p.m. Eastern time.
It's not yet clear how the Facebook vandals got into the pages, since each presumably has a different email account and password as login credentials.
But for every Facebook user who's worried his page is next, just be sure to have a nice, strong password for your account — and don't use it anywhere else.
UPDATE: Later on Thursday, Facebook issued a statement to Deadspin, revealing that the nasty postings were an inside job, so to speak:
"Recently, several Pages made unauthorized posts as a result of actions from a single rogue administrator of these Pages. Our team responded quickly and worked with our partners to eliminate the spam caused by this attack. This was an unique, isolated incident and we are always working to improve our systems to better protect our users and their data."
It wasn't clear from that statement whether the "rogue administrator" worked for Facebook or for Major League Baseball. Deadspin said it spoke to an individual who wanted to remain unnamed and said the poster worked for Major League Baseball's Advanced Media division, which runs the websites and Facebook pages for all 30 major-league teams.
The individual further stated that the posts were intended to have been for internal use only, and that the public never saw "the best ones."