Langerhans is a left-handed hitter with experience at all three outfield positions in his big league career -- with most of his games coming in left. Through nine seasons in the Majors with the Braves, Athletics, Nationals and, most recently, Mariners, he's a .226 hitter with a .333 on-base percentage and 33 home runs in 591 games.
The 31-year-old started the 2011 season on the Mariners' 25-man roster, but after producing a slash line of .173/.317/.346 through 19 games, Langerhans was sent to Triple-A and excelled the rest of the season.
Langerhans batted .313 with 16 homers and 37 RBIs in 57 games in Tacoma, then -- after being purchased by the D-backs in late July -- finished the year batting .308 with six homers and 23 RBIs in 38 games at Reno.
Hurley, a former first-round Draft pick, has been out of the big leagues since July 2008, when he made his only five career starts with Texas. The 26-year-old was deemed one of the Rangers' top prospects, but he missed all of 2009 with a torn rotator cuff and all of '10 with a broken left wrist.
Hurley spent the 2011 season with the Rangers' Triple-A affiliate, going 8-3 with a 5.55 ERA over 16 starts despite missing some time with a concussion.
Diaz also spent last season in the Rangers organization, batting .318 with a .352 on-base percentage and seven homers in a combined 55 games for their Double-A and Triple-A affiliates. The 28-year-old right-handed hitter hasn't been in the big leagues since 2009, when he played 41 of his 44 career games with the Pirates.
Diaz has spent the offseason playing in the Dominican Winter League, batting .338 for the Gigantes del Cibao.
Alden Gonzalez is a reporter for MLB.com. Read his columns and his blog, listen to his podcast and follow him on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.