Kimbo Slice's MMA Fighter Son To Box Former Bachelorette Contestant

Kevin Ferguson Jr. -- MMA fighter and son of the legendary street fighter turned pro Kimbo Slice -- is stepping into the ring ... but he isn't takin' on a fellow pro fighter, he's boxing former Bachelorette contestant "Iggy" Rodriguez.

Yes, for real!

29-year-old Ferguson -- aka "Baby Slice" -- is transitioning from the Bellator cage to the squared circle ... where he'll duke it out with Rodriguez at a Celebrity Boxing event in March.

Of course, 5'11", 155 lb. Kevin Jr. -- 3-3 as a pro -- has fighting in his pedigree, and it shows. His dad, Kimbo, is the most famous street fighter of all-time. The 6'2", 235-pound fighter transitioned from backyard brawling to professional fighting ... where he had a record of 5-2-1.

As for his opponent? Iggy's claim to fame didn't come from punching guys. Rather, Rodriguez was fighting for love when he made his debut on the 13th season of "The Bachelorette."

In fact, the 35-year-old Californian native and consulting firm CEO became a true household name ... when he was depicted as a "snitch" for badmouthing other competitors on Rachel Lindsay's season.

Rodriguez was ultimately eliminated from the show ... after failing to make the top 12.

But, back to the fight. Ferguson and Rodriguez won't be the only attraction that night.

Lamar Odom's ex-fiancée, Sabrina Parr, will fight Jenn Harley, Ronnie Ortiz's former GF -- in a battle of the exes.