According to a Chennaiyin FC press release issued here today, the three players' contracts have been extended by one year.
Karanjit and Thoi were bought by Chennaiyin in season 2 during the player's auctions while Wadoo joined on a free transfer after playing for FC Pune City in the inaugural edition.
"Thoi, Wadoo and Karanjit played important roles in our success last season. We are happy to have them back for our title defence," said Chennaiyin FC head coach Marco Materazzi.