It's a debate we've been having in the office for months ... so we brought in 2 guys who would know a little something about it to hash it out on the "TMZ Sports" TV show. 

Bryant McKinnie is a 6'8", 375 pound former NFL lineman with crazy athletic ability -- and played pro for 11 seasons. 

Tyron Woodley is 5'9" and fights at 170 pounds -- and is considered one of the greatest UFC welterweight champs of all time. 

So, who wins if they fight in the street???

"Somebody's gotta get the business," Woodley said ... "I can't be on the receiving end!"

You gotta listen to the two superstars go back and forth and state their cases about why they would emerge victorious ... it's actually really interesting. 

But, the bottom line here ... DON'T FIGHT WITH EITHER ONE OF THESE GUYS IF YOU VALUE YOUR LIFE!!!