Don't call curtains on Antonio Brown's Steelers career just yet -- the NFL superstar could still end up staying put in Pittsburgh ... so says his good friend, James Harrison.
We spoke with the ex-NFL star outside Shaq's Fun House in ATL about his old team's drama ... and he says if A.B. and Art Rooney II can have a sit-down together ... there's a chance they can fix their relationship.
Of course, Rooney told reporters it was "hard to envision" Brown being on the Steelers next season .