If Floyd Mayweather or Oscar De La Hoya are looking for exhibitions down the road ... former boxing star Fernando Vargas tells TMZ Sports he's down to get back in the ring with both!
Of course, it's been 15 years since the 44-year-old fighter has been in the ring ... but with ex-champs like Mayweather, Mike Tyson and Roy Jones Jr. making comebacks for big money -- we had to ask if Vargas has got any interest.
And, he said yes ... emphatically.
"I'm ready," Vargas said. "My phone is open."
The 26-5 boxer said Floyd would be his ideal opponent ... but rekindling an old rivalry with De La Hoya would also intrigue him.
"Floyd knows my number," Vargas said. "Even if it's not Mayweather, it can be Oscar. Exhibition with me and Oscar. Let's go. I'm ready. Let's go, Oscar. We can make it happen!"
But, before Vargas can even set that up, he'll watch his three sons, Fernando Jr., Amado and Emiliano square up in their own bouts on the undercard of Triller's Fight Club on Saturday.
Emiliano -- the youngest of the three -- will be making his boxing debut ... while his brother, Vargas Jr., is 5-0 (5 KOs). Amado, meanwhile, is 3-0 (2 KOs).
"I know they came from me so they got their DNA from their father," Vargas said. "So, it's a blessing to be able to be here and to see them do what they love."
Vargas -- who trains his kids -- expects a win from each of them ... saying, "All of 'em by knockout. I know they got it, so we're definitely excited."
But, can they beat their dad? We asked ... and Vargas tells us, basically, hell no when it comes to one-on-one, but what about all three against him? His answer might shock you.