He's 49 years old, but WWE legend Bill Goldberg says there's a real chance he could get back in the ring ... as a pro kickboxer.
He's been offered fights in the past -- including a 2015 match with ex-WWE star Alberto Del Rio -- but turned it down at the time saying he needed more training.
But Goldberg -- who owns a Muay Thai gym in California -- just appeared on Submission Radio Australia and said he's still entertaining the idea of fighting for GLORY kickboxing.
"I don’t think the door will ever be closed on that," Goldberg said.
"Even at 49 years old I still really enjoy doing it. I really enjoy learning, I’m a student of the martial art and I’m a student of what it stands for and it’s become kind of a way of life for me. It’s an addiction and it satiates a lot of things for me and it also gives me a challenge. So never say never. You never say never."
Check out the clip ... Goldberg also explains why CM Punk should never fight in the UFC again.