'My Stand Up Skills Woulda Played Well'

WWE superstar Bill Goldberg admits he thought about pursuing an MMA career back in the day -- but ultimately went with pro wrestling because the money was better.

... but the whole thing makes ya wonder -- how would Goldberg have fared in the Octagon?!

Probably pretty well.

"If you know anything about my background when it comes to MMA, I had one of largest MMA gyms in the country back in the late '90s. That was a dream of mine."

Goldberg says he trained alongside UFC legends like Randy Couture and Mark Coleman when they were in their prime.

But, let's get to the point ... how would he do in a real MMA fight?

"I think my stand up skills would have played well, no question," Goldberg tells TMZ…