Marianne Steinbrecher, known as Mari (born August 23, 1983, is a female volleyball player from Brazil, who plays as a wing spiker (basically outside hitter, occasionally opposite hitter) at Fenerbahce from Turkey. She represented her native country at the 2008 Summer Olympics in Beijing, China, in which she helped her country win the gold medal. She known for her high arm swing when hitting and her ability to hit over the top of most blocks.