Michael Jordan is mourning the death of his former Chicago Bulls general manager, Jerry Krause ... offering his "heartfelt condolences" to Jerry's family and friends.
Jordan won all 6 of his NBA titles while playing under Krause -- and, while they butted heads at times, MJ is honoring his memory now.
Jordan issued a statement to TMZ Sports through his rep saying, "Jerry was a key figure in the Chicago Bulls dynasty of the 1990s and meant so much to the Bulls, the White Sox and the entire city of Chicago.