The 34-year-old wrestler was among 12 national observers appointed by the then Sports Minister Vijay Goel in March.
"Wrestler Shri Sushil Kumar and Boxer Ms Mary C Kom have submitted their resignation as National Sports Observers," the sports ministry said in a release today.
"As both the top athletes are still active in their respective fields, wrestling (Men) and boxing (Women), they felt that this could be seen as conflict of interest.
Sports Minister Rajyavardhan Rathore thanked Sushil and Mary Kom for their services and said the government will continue to benefit from their rich insights and expertise.
Mary Kom had resigned as the national observer for boxing about a fortnight ago after Rathore made it clear that active sportspersons will not be considered for the position.
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