"A substantial part of wizarding society knows nothing about Muggle sports"
While Dumbledore may have known about ten-pin bowling, according to Rowling on Pottermore, a substantial portion of wizards and witches were clueless about muggle sports.
The wizarding world’s affection for the Scottish rugby team is all the more bizarre because a substantial part of wizarding society knows nothing about Muggle sports, which they regard as inherently dull and even silly.
Scottish Rugby - Writings by J.K. Rowling, Pottermore
In fact, according to the International Statute of Secrecy, it is forbidden for wizards to take part in Muggle sports:
The International Statute of Secrecy expressly forbids wizards to participate in Muggle sport, but there is nothing illegal in supporting a Muggle side
There are, however, historical exceptions. In the article above, Rowling goes on to call the Scottish rugby team a "wizarding meme – part in-joke, part genuine interest...". The reason for the wizarding world's fondness for Scottish Rugby lies with Angus Buchanan, a squib. The full tale can be read in the article above, but in short, Angus was cast out by his father for being a squib, after a life of hardship and labour in Edinburgh from age 11, Angus had developed the skills to be selected for the first International Rugby match, between England and Scotland. This led Angus to becoming famous amongst Wizards and Muggles
Wizards of many nationalities began turning up to watch him play sport. Unfortunately, cricket found little favour with wizardkind... Rugby held more appeal. Wizards could not help but admire the strength and courage of Muggles prepared to engage in a sport so brutal, without recourse to Disapparating out of the way, or access to Skele-Gro to repair broken bones...
The Wizarding world had become so fond of the Scottish Rugby union they'd set up a supporters club, as well as tried to smuggle squibs into the national team, even if the aforementioned ban disallows it.
Shortly after Angus’s death, the Wizarding Supporters of Scottish Rugby Union was set up in his memory by his devoted fans. The WSSRU, which exists to this day, has both Scottish and foreign wizarding members.
However, the WSSRU has often had to deny the persistent rumour that its secret mission is to smuggle a talented Squib on to every Scottish team. Current suspects include Kelly Brown (possible cousin of Lavender’s), Jim Hamilton (strong resemblance to Hagrid) and Stuart Hogg (enough said).
However, muggle-borns, such as Hermione and Dean Thomas would almost certainly have been exposed to Muggle sports and followed such "shenanigans" after discovering their magical skills. It is however, as likely, that upon joining the Wizarding world, appreciation for such sports would dwindle as the general populace was either unaware or did not find interest in Muggle sports.
Evidence as to the disinterest from the Wizarding world in Muggle sports is evident at times in the books. As @Shreedhar points out (and the quote kindle provided by @Bellatrix) wizards were dumbfounded by the lack of movement in Muggle sports posters
Ron had already had a big argument with Dean Thomas, who shared their dormitory, about football. Ron couldn’t see what was exciting about a game with only one ball where no one was allowed to fly. Harry had caught Ron prodding Dean’s poster of West Ham football team, trying to make the players move.”
Harry Potter and the Philosopher's Stone - Chapter 9: The Midnight Duel
Further evidence, again involving Dean Thomas and Ronald, is shown later in the same book, when Ron shows a lack of knowledge as to aspects of football (although he does acknowledge the existence of the sport).
“Down in the stands, Dean Thomas was yelling, ‘Send him off, ref! Red card!’
‘This isn’t football, Dean,’ Ron reminded him. ‘You can’t send people off in Quidditch – and what’s a red card?”
Harry Potter and the Philosopher's Stone - Chapter 11: Quidditch