Boxing champ Andre Berto is coming out swinging HARD at Victor Ortiz ... telling TMZ Sports V.O. is INSANE for asking Floyd 'Money' Mayweather for a rematch -- because Floyd would KILL HIM.

Berto was out at Katsuya in Hollywood last night -- when he said Ortiz sounded "crazy" and "desperate" for calling out Floyd ... saying, "[Victor] needs to fight me again. I'll f**k his ass up."

Berto says if Ortiz can beat him - "which he won't" - then he deserves a shot at Mayweather.

FYI - Ortiz DEFEATED Berto when they fought back in 2011 with Ortiz getting the unanimous decision.

Still, Berto is fired up ... saying, "I need to go ahead to whoop his ass before it's said and done."

*This article provided to Doghouse Boxing from our friends at http://www.tmzsports.com/

Also recent from by TMZ:
Victor Ortiz demands a rematch w/ Floyd Mayweather
Mayweather issues apology: "I'm not perfect"
Floyd Mayweather's Ex Sues! He Beat My Ass
Floyd Mayweather reacts to 50 Cent & Pacquiao
Floyd Mayweather reacts to 50 Cent & Pacquiao
Mayweather Jr. - I Had Sex With T.I.'s Wife
Floyd Mayweather's $56 Million dollar gift for Girlfriend
Evander Holyfield on who hit the Hardest - TMZ Video
Mayweather confirms unconditional love for Bieber
Mayweather's Kids in Car accident & Bieber comes to Rescue
Floyd Jr. Exclusive: "I've made a lot of Money off this Man!
Floyd Mayweather Jr. drops $100k Rainstorm on Strippers
Pacquiao bumps into Justin Bieber while dropping $20k
Chris Brown Trained to Fight w/ Boxing Champ Andre Berto
Kassim Ouma Jailed - K.O.'s Guy Over Alleged Gay Passes
Dewey Bozella - 'Hurricane' Carter Inspired Me
George Foreman - Bernard Hopkins Should Retire
Mayweather & Miss Jackson - We've Broken Up FOR GOOD!
Danny Garcia - 1st Thing I Do After a Fight... HAVE SEX!
'Black Dynamite' Star - I'd Beat Floyd Mayweather In an MMA
Andre Berto - TMZ Exclusive - "It's brutal man, it's brutal"
Floyd Jr. - New Million Dollar Watch...
Floyd Mayweather uses Justin Bieber Music to inspire
Floyd Mayweather Jr. Accusers - Injury Photos
Floyd Jr Allegedly Involved in Kidnapping & Brutal Beating
Mike Tyson has Priceless Financial Advice for Antonio Tarver
Antonio Tarver Arrest Details & Mug Shot - TMZ Exclusive
Pernell Whitaker's Mom: I Can't Believe He EVICTED Me!
Floyd Mayweather Sr vs. Roberto Guerrero - TMZ Exclusive
Roy Jones Jr. - I'm Running for Mayor! - TMZ Exclusive
Pacquiao: Yes, I Eat Aborted Duck Fetuses / Cooked Alive
Kelly Pavlik HOSPITALIZED... After Collapsing at Court
Kelly Pavlik Arrested! Cabbie: 'That Drunk F*** Ripped Me Off!'

Tune in to TMZ on TV weekdays Monday through Friday (check http://www.tmz.com/when-its-on for syndicated/local listings at the bottom of the page)

Visit the TMZ Store: http://tmzstore.com

Tune in to TMZ on TV weekdays Monday through Friday (check http://www.tmz.com/tmztv/ for syndicated/local listings).

This article provided to Doghouse Boxing by our good friends at TMZ.com.

For much more Boxing news updates, visit the home page HERE at Doghouse Boxing. Also make sure to follow Doghouse Boxing's news wire