Fabián Andrés Maidana (born 22 June 1992) is an Argentine professional boxer. As an amateur, he won a silver medal at the 2010 Youth World Championships and a bronze at the 2010 Summer Youth Olympics.
He is the younger brother of former two-division world champion Marcos Maidana.
Maidana moved to Oxnard, California to train with Robert Garcia, Marcos' former trainer, on the advice of Sebastián Contursi, Marcos' former manager. Maidana made his professional debut on 21 June 2014, defeating Eddie Diaz by unanimous decision on the undercard of the Vasyl Lomachenko–Gary Russell Jr. title fight at the StubHub Center. In his next two fights, he scored a first-round knockout against Philip Soriano on the Shawn Porter–Kell Brook card and a first-round technical knockout against Jared Teer on the Mayweather–Maidana II card. After eight straight wins in the United States, Maidana competed in Argentina for the first time, defeating Andrés Amarilla by unanimous decision in Necochea on 9 April 2016. He moved to 10–0 with a victory over Puerto Rican prospect Jorge Maysonet Jr., who failed to answer the bell for the seventh round.