Navarro, 24, profiles as a candidate to compete for the role as a backup infielder in Pittsburgh. In limited Major League action over the past two seasons, Navarro has appeared at second, third, short and in the outfield. Coming up through Boston's farm system, Navarro played primarily as a shortstop.
The Pirates, who designated Pedro Ciriaco for assignment earlier on Wednesday, will need a backup to new shortstop Clint Barmes in 2012.
A .279 hitter over six Minor League seasons, Navarro was signed as a non-drafted free agent by the Red Sox in 2005. He entered 2011 ranked as the organization's 12th-best prospect but was later dealt to the Royals in exchange for Mike Aviles at the Trade Deadline.
In 42 career big league games, Navarro has hit .206 with a .250 on-base percentage. He batted .264 with 11 doubles, seven homers and 22 RBIs in 59 Triple-A games last year.
Pounders, a second-round pick in the 2009 First-Year Player Draft, went 5-5 with a 3.68 ERA in 36 games (one start) at the low-A level in 2011. Goris, 21, hit .350 with 20 doubles, five homers, 46 RBIs and 53 runs scored in the Dominican Summer League. He was named to the DSL All-Star team each of the past two seasons.
Jenifer Langosch is a reporter for MLB.com. Read her blog, By Gosh, It's Langosch, and follow her on Twitter @LangoschMLB. This story was not subject to the approval of Major League Baseball or its clubs.