Vadocz is known for being a versatile midfielder, with both defending and attacking capabilities in the middle. With over 40 appearances for the Hungarian national team to his credit, Vadocz has showcased his talent in clubs like Osasuna, Perth Glory and FC Pune City as well.
Vieira, known for his energetic performances with teams like Gremio, Red Bull Brazil and Athens in the Brazilian and Uruguayan first divisions, is a capable full back and central defender.
Commenting on the signings, Mumbai City FC coach Alexandre Guimaraes said, "Vadocz and Gerson are both highly skilled and versatile, and can play multiple positions. I have seen them carefully, and they fit my requirements and vision for the team very well. They are great additions to the squad, and I am jubilant to have them join our efforts for a successful season 3 in the ISL.