For the 100th birthday of the club, new covered stands were built with a buffet, restrooms, and 3,137 seats on the so-called "Sunny wing" or "Napos oldal".

[4] Despite not having won any top-flight (Nemzeti Bajnokság I) titles throughout their entire existence, and never having spent more than 10 consecutive seasons in the 1st Division, DVTK has a rabid and passionate fanbase, their number being estimated to be 100,000-150,000 people.

A group of DVTK fans also live in the southern part of the country, in Szeged, and in former Hungarian territories, such as Árhely, Szabadka and Ruzs.

That season, four out of the five most attended 1st Division games were played at the DVTK stadium, against Újpest, Ferencváros, Győri Eto and MTK.

Ferencvaros were the hardest hit by the UEFA measures as club were fined by €20,000 and the partial closure of their stadium following monkey chants and racist banners displayed in both legs in Malta and Hungary.

In the 2000s, other supporter groups, such as Commandos, Bajtársak (Brothers In Arms) and Hazádnak Rendületlenül (Steadfastly For Your Nation) would come to exist, further solidifying the Ultras' impact on the football scene in Diósgyőr.

In the 2010s decade, groups such as Beagle Boys, Egység, Trógerek and Red Company, Pacin Ultras and Barczikai Brigád were founded.

In November 2013, prior to a home game against Videoton, members of the security personnel were unwilling to let in the flags of Sturm Und Drang, Commandos and Hazádnak Rendületlenül.

In response to the flags being taken down, Ultras Diósgyőr announced that they would boyscott the ensuing games, and asked the respective supporter groups of other Hungarian clubs to follow suit.

Since DVTK established themselves as a solid first division club in the mid-2000s, and due to the fact, that Nyíregyháza spent all but 4 seasons in the otp bank liga in the same timeframe, the two teams have rarely met in the 21st century, with the last time being in March 2023.

Nevertheless, the matches contested between them remains one of the most highly attended fixtures in eastern Hungary, with fights, animosity and violence often leaving their mark on these games.

In 1997, Diósgyőr would advance to the 2nd Division play-offs, by finishing 2nd, 1 point above Nyíregyháza, despite losing to them 1–0 in the penultimate day of the season, due to a 92nd-minute penalty from István Kovács.

In August 1999 the clubs played a 2–2 draw, with Danut Franzu becoming the fourth Diósgyőr player to score a brace at an eastern derby.

The derby would not be held until October 2001, due to DVTK disbanding because of financial problems, for a short period of time, before being resurrected by the fans.

In the 2010/11 season of the 2nd division, DVTK defeated Nyíregyháza in one of the most intense eastern derbies of all time, as the game featured six yellow cards and one red.

A total of 4,000 visiting DVTK fans were present at the game, with the fanatics displaying an all-sector choreography, with red and white balloons.

Fans of DVTK presented a tifo, which portrayed Simba from Lion King as a Diósgyőr ultra, with three hienas wearing Nyíregyháza Spartacus kits.

After the game, a select group of DVTK fans entered the running track between he field and the stands, and fought with the riot police, who used batons and teargas to regain control of the crowd.

The streak finally came to an end on 4 October 2014, when DVTK defeated FTC 2–1, with Miroslav Grumic and Takács scoring from the home team.

A similar case of bad luck could be said about DVTK's performance at FTC's old stadium, Stadion Albert Flórián, with the red and whites only managing to leave the pitch victorious after only two meetings, between 1972 and 1998.

The club was also unable to get a win at Üllői Út for 31 years, between March 1941, and April 1972, when István Gass' goal was enough for the pride of Miskolc, to defeat FTC in their own backyard.

This was Ferencváros' first home defeat of the season, and DVTK became only the third Hungarian team of the '90s to score four goals at Üllői Út, after Győri ETO, and MTK.

Ultras Diósgyőr also has a collection of chants, sung at games mainly against Budapest-based rivals, which are dedicated to tarnishing the city's reputation.

Kerület?, to the tune of FTC's most famous chant, Fradi áléó and Budapesten Mindenki'' which roughly translate to "Where is that fucking 9th District?

Ferencváros also happens to be the team that DVTK has faired off against the worst over the years, only managing to collect five league wins over them in the 21st century, coming in 2009, 2014, 2018, 2021 & 2024.

Four DVTK players have scored a brace against FTC, Ferenc Oláh in 1976, Kulcsár & Egressy during the same game in 1998, and Seymi L'imam in 2013.

In November 2007, UTE defeated DVTK in Miskolc 1–4, with three of the 4 Újpest goalscorers having formerly played on Diósgyőr, namely Foxi, Tisza and Sadjo Haman.

On 31 December 1954, DVTK lost 1–6 to Honvéd, with two of the most prolific and classiest players of the Hungarian National team, Kocsis and Puskás, taking it upon themselves to score 4 and 2 goals, respectively.

In June 1998, Diósgyőr played Videoton in a famous 4–1 victory on the last day of the season, with DVTK cult-hero, 49 year old goalkeeper, György Veréb being subbed on in the second half.

They have also met in the 2014 League Cup Final, with DVTK managing to score an unlikely victory against Videoton, in front of about 6,000 Miskolc faithful.