Retired NBA big men Tim Thomas and Kenyon Martin have beef.

On Friday, rapper 50 Cent took to Instagram to claim that Thomas and K-Mart will settle things in the ring on the same card headlined by rappers Soulja Boy and Chris Brown. Retired boxer Floyd Mayweather Jr. is promoting the bout.

That’d be a star-studded undercard scrap.

Thomas and Martin have been foes for years, as Jason McIntyre detailed at The Big Lead.

The fight is said to be taking place in Las Vegas this March.