Marianella Castellanos (born 15 April 1984) is a Venezuelan softball player.

She competed for Venezuela at the 2008 Summer Olympics.

Castellanos played college softball at Seminole State College from 2002 to 2003 and was honored to the 2003 NJCAA Division I All-Tournament Team.

[1][2][3] Bogado represented Venezuela at the 2008 Summer Olympics, where the Venezuelan team finished seventh with a 2–5 record.

She played as a relief pitcher in three games (against United States, China and Japan), recording a 10.50 ERA and one strikeout in 4.2 innings pitched[4] She won the gold medal with the Venezuelan team at the San Salvador 2002 and Cartagena de Indias 2006 editions of the Central American and Caribbean Games.