Greg Hardy's had a nice run to start his fighting career ... but it'll all come crashing down as soon as he stops "fighting bums" -- so says ex-UFC star Brendan Schaub.
We got the UFC fighter-turned-MMA analyst out at LAX ... and he pulled no punches when it came to breaking down Hardy's fight career -- both present and future.
"There's other guys I would market over Greg Hardy for a number of reasons," Schaub says.
"He's not young, he's fighting bums."
Brendan says he sees Greg's run -- which has already featured 3 devastating knockouts in 3 bouts -- coming to an end as soon as he gets to "those real killers in the UFC."
In fact ... Brendan tells us if Shawne Merriman and Hardy go toe-to-toe in a scrap that they both want -- Schaub says he's got "Lights Out" in the match.
"I'll take Shawne," Brendan tells us. "He's a better football player, so maybe he's a better fighter."
See also
Greg Hardy Warns UFC Heavyweights, 'I'm Coming to Wreck Shop!'
NBA's Deron Williams Turned Down Offer To Fight Greg Hardy, Here's Why!
- Brendan Schaub Greg Hardy Shawne Merriman You Might Want to Rethink Fights TMZ Sports MMA UFC Exclusive Football Fights & Feuds
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