In the YKS TN Clubs 2024 tournament, the Sivagangai Warriors include A Nanthakumar in their roster. Born on July 15, 1999, in Siruvandal, Ramanathapuram, Tamil Nadu, Nanthakumar currently resides at Trichy Police Quarters, where he works as a Police Constable. His father, Annadurai, is a farmer, and his mother, Thavamani, is a homemaker. He has an elder sister named Ponmalar, who doesn't play kabaddi. Nanthakumar began playing kabaddi at the age of 15 out of sheer love for the sport. He specializes as a left raider and excels in executing toe touches. His coach, Rajesh, who is also the captain of their village team, has played a crucial role in his development as a player. He practices with the Tamil Nadu Police Kabaddi Team in Trichy. His favorite player is his coach, Rajesh, whom he credits for grooming him into a great player. Nanthakumar has represented his team in various tournaments, including the Junior Nationals in Kolkata in 2019, where he won a bronze medal, and the Khelo India Games in Assam in the same year. He has also participated in three South Zone University Games from 2016 to 2019. Apart from kabaddi, Nanthakumar has showcased his athleticism in athletics, particularly in the long jump, at the School State Level. He holds a college graduation degree in Physical Education. One of his career highlights includes a memorable match in Thanjavur in 2022, where he clinched victory for his team with the last raid and received the Best Player award. Nanthakumar aspires to play for Team India in the future, aiming to reach greater heights in his kabaddi career.