Rodrigo Oliveira de Bittencourt (born 20 March 1983 in Canoas), commonly known as Diguinho, is a Brazilian footballer who plays as a defensive midfielder for Vasco da Gama.He played for Fluminense from 2009 to 2014 where he won two league titles. He also took part in the final of the 2009 Copa Sudamericana against LDU Quito of Ecuador. He scored the first goal in the second leg at the Maracanã but it wasn't enough to overcome the Ecuadorians.