Rosetta Resources Inc.

Rosetta Resources Inc., Houston, (Nasdaq: ROSE) announced that it would seek to divest noncore properties in the Gulf of Mexico and Texas state waters as part of a 2010 divestiture program. These properties averaged a combined production rate of 12 million cubic feet equivalent per day in 2009, down 12 million cubic feet equivalent from the prior year. Proved reserves are 27 billion cubic feet equivalent (11 billion probable and possible). Contact Michael J. Rosinski, 713-335-4037, rosinskim@rosettaresources.com.