Wellington Leal Dias Santos,[2] known as Megaton Dias, is a Brazilian jiu-jitsu (BJJ) practitioner, and 7th degree coral belt of the Gracie Humaitá jiu-jitsu association under Royler Gracie.

Wellington originally trained under Rogerio Camoes and later at the Gracie Humaitá jiu-jitsu school in Rio de Janeiro.

[3][4] Dias is nicknamed "Megaton" because of his judo training and propensity to launch his competitors high into the air, similar to the blast of a nuclear bomb.

[10] Dias competed at the IBJJF Master International - North America Championship on May 31, 2023 and won gold medals in both the Master 6 lightweight and absolute divisions.

His wife Luciana and daughter Mackenzie Dern are also black belts in the discipline, under his tutelage.