Marius Cornel Popa (born 31 July 1978) is a Romanian former professional footballer who serves as a goalkeeping coach for Liga I club FCSB.
He started his career at the local team, Bihor Oradea in 1997 and three years later moved to FC Naţional.
However, he missed out on the Cupa României Final lost against Rapid Bucharest in the 2006/2007 season, when poor form and an injury a few weeks before the match offered youngster Costel Pantilimon the chance the shine.
Pantilimon did not manage to hold on to his first team slot and Popa has since returned in goal.
Popa has also been called up to the Romania national team eleven times and made his debut in a friendly against Russia.