Mike Tyson accidentally duped fans with an intense sparring video he just posted on social media ... because while a ton of people assumed the clip was recent -- it's actually a few years old.
Iron Mike shared the workout footage earlier Tuesday morning ... captioning the post, "Roll with the punches."
56-year-old Mike looks incredible in the video ... so we had to reach out to his camp to find out if he was training for any particular reason.
The vid had people excited -- as a potential event could have been on the horizon.