LeBron James sent fans into a frenzy by teasing a retirement announcement only for it to be an ad ... and JJ Redick can't believe people thought it was anything else -- telling reporters, "You guys are idiots."
Redick was meeting with the media when he was asked about James' "Second Decision" rollout ... which was a big promotion for Hennessy.
While fans were scrambling to scoop up tickets to catch King James in action one last time, the Lakers head coach thought it was obvious.