As a joke, someone referred to Coach Wilson on a pull quote as "head coach of the Columbia football team until Monday morning". This was supposed to be removed before print, but nobody caught it.
To make matters worse, the coach actually was fired that weekend (not even 24 hours after the team had its only win of the season)! That led to an incredibly awkward retraction: ("This was a joke, and we're sorry... but apparently we were right, even though we didn't know it"[1])
This sort of stuff goes on in newsrooms all the time. I'm actually surprised that these mistakes don't happen more often, given how common these are, and given that most copy-editing happens in the wee hours of the morning, fueled by caffeine and sleep deprivation.
[0] Don't have time to scan through the PDFs of the printed versions (IIRC it was only in the printed version), but it was one of these articles: http://www.columbiaspectator.com/tags/norries-wilson
[1] I was on the board of the paper at the time, so I can confirm that we actually didn't have prior knowledge of this - it really was just a very amusingly-timed joke.