Kokolakis joined the
Greek League club
Panathinaikos in 1969. With Panathinaikos, he won 9 Greek League championships (1971, 1972, 1973, 1974, 1975, 1977, 1980, 1981, 1982), and 3
Greek Cups (1979, 1982, 1983). He then moved to the Greek club
Aris in 1983. With Aris, he won 3 more Greek League championships (1985, 1986, 1987), and two more Greek Cups (1985 and 1987). ==National team career==