NASHVILLE, Tenn. - Right-handed pitcher Mark Melancon and outfielder Jack Shuck will join the Round Rock Express as the team opens a four-game series Saturday night against the Nashville Sounds. Melancon was acquired from the New York Yankees organization, while Shuck was promoted from Double-A Corpus Christi. Melancon, originally selected by the Yankees in the ninth round of the 2006 June Draft, has an 18-3 career minor league record in 123 relief appearances with a 2.84 ERA, allowing just 178 hits in 212.0 innings of work with 209 strikeouts and 14 saves. He has spent parts of the last two seasons in the Majors with New York, appearing in 15 games in relief (0-0 record) and posting a 4.87 ERA (11ER/20.1IP). A 2005 USA Baseball National Team member, Melancon has spent most of the 2010 season with Triple-A Scranton/Wilkes-Barre, where he was 6-1 in 40 appearances with a 3.67 ERA and six saves with 58 strikeouts. In 2009-10 combined at Triple A, Melancon is 11-2 in 84 appearances with a 3.20 ERA and 134 strikeouts in 129.1 innings pitched and 10 saves. While at the University of Arizona, Melancon set a school record for saves. A product of Ohio State, Shuck was the Astros sixth-round draft pick in 2008. He has made steady progression through the Astros organization, spending all of 2008 at Class-A short-season Tri-City, all of 2009 at Class-A Lancaster and this season's first 101 games at Corpus Christi. Shuck hit .298 with one home run and 28 RBI for the Hooks. He is a career .304 hitter in professional baseball.