NK Inter Zaprešić
The club was originally established in 1929 as NK Sava. In 1932 the name was changed to NK Jelačić. After the end of WW2 the club was renamed NK Zaprešić. The club kept that name until 1962, when they were renamed Jugokeramika, after their main sponsor, a local ceramics factory.
That same year the club's ground, ŠRC Zaprešić, was built and opened. The club's first notable success came in the 1980s under the tenure of manager Zorislav Srebrić (1985–1990).
Up until then the club had spent their entire existence in lower level leagues, but in 1987 they managed to reach the finals of the qualifying playoff for promotion to the Yugoslav Second League (which they lost against fellow Croatian side Šparta from Beli Manastir). In 1987 the east stand of the ground was built, and Jugokeramika's home served as one of the venues for the 1987 Summer Universiade football tournament.
Following Croatia's independence in 1991, Jugokeramika (the factory) changed its name to "Inker" (an acronym for Industrija keramike, Eng: Ceramics Industry) and the club followed suit, adopting the name NK Inker Zaprešić.
The club participated in the inaugural season of the newly established Croatian championship and finished fourth, but more memorable was their 1992 Croatian Cup win.
The team was managed by Ilija Lončarević and notable players of the cup-winning squad included Croatian internationals Ivan Cvjetković, Krunoslav Jurčić and Zvonimir Soldo.
Although this meant that Inker had qualified for the Cup Winners' Cup, UEFA didn't let Croatian clubs to participate in European competitions due to the ongoing war, so Inker missed out on their first ever chance to participate in continental competitions
However, the club holds the distinction of playing the first ever international club match hosted by a Croatian club since Croatian independence, a friendly against Sturm Graz played in February 1992, and they were also the first Croatian side to play abroad, when they played a friendly against Brighton & Hove Albion in England in the summer of 1991.
In the following years the club's performances rapidly declined and in 1997 they were relegated to 2. HNL, and in 1999 further down to 3. HNL.
The year 2000 proved to be a turning point, and in 2001 they bounced back to second level and in 2003 got promoted back to top level after six years of absence. In 2003 their main sponsor the ceramics factory Inker ceased sponsoring the club, so the club was renamed once again, to Inter Zaprešić.
In the 2004–05 season they finished runners-up in the league, which is still their record-high finish. The following season Inter finally debuted in European competitions, but were knocked out in their first tie by Serbian side Red Star 7–1 on aggregate in the second qualifying round of the 2005–06 UEFA Cup, with Srđan Pecelj scoring Inter's only European goal to date.
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Inter's success between 2002 and 2005 was largely helped by players who were loaned from Croatian powerhouse Dinamo Zagreb (such as Luka Modrić, Vedran Ćorluka and Eduardo), so Inter's fortunes changed again once again after they were recalled to Dinamo. They slipped down to second level again in 2006, but managed to win promotion immediately in the 2006–07 season. The following years were a struggle and the main goal was to preserve Prva HNL status except in 2010-11 when the club surprisingly finished 5th overall. In 2013, they slipped down, for the third time in their history, to Druga HNL.
Because of Zaprešić's geographic proximity to Zagreb, the hometown of GNK Dinamo Zagreb which has the biggest fanbase in Croatia, Inter Zaprešić always struggled to attract people to games. Nevertheless, throughout the years, a group of fans managed to organise themselves into the supporters group called Divlje Svinje (Wild Pigs).
In 1990's, some members of Bad Blue Boys who wanted a new challenge came together and cheered using the flares during the game of Inter Zaprešić. Few days later, the picture of them was released in daily newspapers and the event is known as the day when Wild Pigs were formed. More and more people were joining the group on a game to game basis. In 1991, Wild Pigs were formally registered as a citizen association in Zaprešić.
At the end of the 1996/97 season, Inter Zaprešić was relegated to a lower level and members of Wild Pigs started to give up with organised support and those left did not have enough patience and will to go on. As more and more members were leaving the group, eventually it has fallen apart.
At the end of the 2002/03 season, Inter Zaprešić came back to the top tier of Croatian football after playing 6 years in lower divisions. That was the spark needed for forming Wild Pigs once again. During 2004/05, Inter Zaprešić was a contender for the national championship which was the huge boost to fanbase and membership of the group. Several records were broken that year for the club, especially in attendance category.
Just a year after, at the end of 2005/06 season, Inter Zaprešić was relegated once again
to lower division. The existence of the group was in question, just like in 1997. But this time, the group did not fall apart.
Reviving the group
In 2012/13, the group was revived by the younger fans who organised cheering during the first home game in the second part of season. Eventually, club had support in every home and away game. At the end of the season, Inter Zaprešić was relegated to a lower division, but Wild Pigs continued with their effort to support the team.