A KCA release said B Vinod Kumar has been appointed as the new president and Jayesh George will serve as the secretary of the association.
"The decision was taken at a special General Body Meeting held at Kochi," it said.
Along with Mathew and Ananthanarayan, other office-bearers includingS Haridas, T R Balakrishnan and Sunil Koshy Georgewho have "cumulatively or separately completed nine years in office", also quit their posts following the Supreme Court directive to BCCI to implement the Lodha Panel reforms.
Sreejith V Nair, currently serving as the secretary of Alappuza District Cricket Association, willbe the new KCA treasurer.
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Rejith Rajendran, V B Ishaque , Nazir Machan (Vice Presidents) and V G Reghunath( Finance Committee Chairman) are the other office bearers.
The changes were brought hours after the Supreme Court removed BCCI president Anurag Thakur and secretary Ajay Shirke.
Mathew, who has served the KCA as an office-bearer for nearly two decades, is also a BCCI vice-president.
Ananthanarayan vacated his post as he has completed nearly 11 years in office.
Mathew and his team members left office seven months ahead of completion of current term of office-bearers.