They are dying off and there is nothing that you, I, or anyone else can do about it. The numbers of 11 Boston Celtics who played for the team during the greatest of all sports dynasties, 1957-1969, hang from the rafters of TD Garden. With the passing of K. C. Jones on Christmas Day, more than half of them, six in all, have now died. None of them died young and only one, John Havlicek, did not live to see the age of 80 -- and he came close. But time was up for the six who have died and the clock is ticking for the five who are still with us.