Mason joined the UMA in December of 2017. He would rise up in the ranks all the way to Commander by January 2018. He would then form the New Underground Mafias Army and lead the army. After the unification of the two UMA factions, he would become the Commander of the UMA. He showed his true loyalty to the UMA and grew it. He became credited as the best CPRA UMA leader in 2018. He would rejoin UMA in July 2018 for Field Marshal.