Mersin İdmanyurdu (also Mersin İdman Yurdu, Mersin İY, or MİY) Sports Club; located in Mersin, east Mediterranean coast of Turkey in 2001–02. It was the first season in Turkish football league system that a single group second division was introduced with name of Second League Category A. The continuation of Turkish Second Football League was renamed as Second League Category B which was lowered to third layer accordingly. The team took place in first season of this division for the first time, and in Second League for 28th time since its foundation in 1963–64. Mersin İdmanyurdu S.K. has finished Second League Category B Promotion Group at second place in 2001–02 season and promoted to 2002–03 TFF First League.

Macit Özcan was club president. Nasır Belci managed the team during the season. Şafak Burak Bayman was the mostly appeared player as well as season top goalscorer.

Mersin İdmanyurdu took place in 2001–02 Second League Category B (which has been named as "Second League Category B" between 2001–02 and 2005–06; "TFF League B" in 2006–07 and "TFF Second League" since 2007–08 season). League was played by 50 teams in three stages. League was started on 19 August 2001. In the first stage teams fought in regionally specified five ranking groups (10 teams in each) for top two rankings to be qualified for Promotion Group in the next stage. In the second stage 10 teams fought for promotion to 2002-03 Second League Category A. Champions and runners-up directly promoted. Remaining 8 teams played in Classification Groups. Classification group winners were qualified to promotion play-offs, while bottom two teams relegated to 2002–03 TFF Third League. In the third stage, the third team was determined in promotion-play-offs played in one-leg elimination system in a neutral venue. Play-offs were played by 8 teams (three from promotion group, 5 from each classification groups) in Denizli Atatürk Stadium between 22–27 May 2002.

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