Mid-Eastern Athletic Conference was created in 1970.

Mid-Eastern Athletic Conference Men's Basketball Player of the Year was created in 1972.

Eastern College Athletic Conference was created in 1938.

I'm assuming we're talking about the National Basketball Association here. I could list the names of the NCAA conferences as well, but that would take a little longer than I want to spend. Also, the names of the Conferences is pretty easy: Eastern Conference and Western Conference. For the sake of completeness, I'm assuming that the question refers to the names of the Divisions within those Conferences. The NBA is arranged as follows: EASTERN CONFERENCE - Atlantic Division, Central Division, Southeast Division WESTERN CONFERENCE - Northwest Division, Pacific Division, Southwest Division