The nine tested positive when they returned to camp after a Christmas break.
While the Games will still be called the 2020 Olympics, they have been changed by Covid-19.
He died of a heart attack, having undergone brain surgery earlier this month.
KCB FC released Gabriel Mugabo mid this year as the club started a restructuring process.
Eto’o’s car was hit by a public transport vehicle on the Nkongsamba-Douala road.