Usman Nurmagomedov 'So Excited' To Have Cain Velasquez Corner Bellator 300 Fight

Cain Velasquez has been given the all-go to corner Usman Nurmagomedov's Bellator 300 fight this weekend despite his ongoing criminal case ... and Usman tells TMZ Sports he couldn't be more pumped to have the UFC legend by his side.

"I'm so excited," the MMA star said.

It was unknown a few weeks ago if Velasquez would be able to help out in Nurmagomedov's championship tilt against Brent Primus in San Diego on Saturday night ... as he's still facing 10 charges for allegedly trying to shoot Harry Goularte, a man who had been accused of molesting one of his close relatives.

But, according to MMAFighting.com, Velasquez was cleared by the courts recently to help coach in the bout ... and Nurmagomedov -- who's been training with Velasquez at American Kickboxing Academy in San Jose in the leadup to the match -- is thrilled.

"Cain he's like, he talks with everybody the same," the 25-year-old said. "If you're a star, he doesn't talk with you different."

"He's, like, a very good person," Usman added. "Family guy. He's really humble, too. Very kind guy."

Cain isn't the only MMA legend to help Nurmagomedov gear up for his match ... he said his cousin, Khabib Numagomedov, has called to give tips and advice as well.