Augenstein spent last season with the Rays' Triple-A affiliate in Durham, where he went 2-1 with three saves and a 3.59 ERA over 42 2/3 innings over 23 games. The 26-year-old righty owns a career 4.16 ERA in the Minors with an impressive 3.79 strikeout-to-walk ratio. He last pitched in the Majors in 2011, giving up six earned runs in just 5 2/3 innings for the Cardinals.
Olmedo, 31, played 20 games for the White Sox last season, splitting time at shortstop as well as second and third base while hitting .244 with a .537 OPS. In 218 Major League games, Olmedo has posted a .230/.273/.293 batting line. He spent most of 2012 with Triple-A Charlotte and batted .273.
Elarton, 36, hasn't pitched in the Majors since 2008, when he recorded a 3.52 ERA over eight games with the Indians. He started 26 games with the Phillies' Triple-A club in Lehigh Valley last year and finished 6-11 with a 5.41 ERA.
Vasquez, 30, spent the last three years split between independent Atlantic League and the Australian Baseball League. He last pitched in the Majors in 2009, going 2-5 with a 5.84 ERA in 14 games, including seven starts, for the Pirates.
Lane, 35, is a converted outfielder who spent most of 2012 with the independent Sugar Land Skeeters, who named him their Most Valuable Player. Lane went 9-5 with a 3.17 ERA and one complete game in 110 2/3 innings over 18 games. He played another 61 games, mostly in the outfield, and hit .275 with nine home runs. Lane was part of the Astros' World Series club in 2005. He was a .241 hitter in six Major League seasons and owns a .280/.362/.488 batting line in the Minors.
"I would like to thank the Skeeters organization for the opportunity to be a part of their first season," Lane said in a statement. "It was another great experience in my career and a great opportunity to continue my journey back to the big leagues. From the front office, to the coaching staff, to my teammates and the fans, thank you for all the support. Sugar Land has something special with the Skeeters and I will never forget what it did for me."
O'Connor, 32, went 3-6 with a 3.73 ERA in 31 games (15 starts) for Triple-A Scranton/Wilkes-Barre last season. He pitched in nine games for the Mets in 2011, posting a 2.70 ERA.
Rodriguez, 26, comes from the Red Sox farm system. He reached Triple-A Pawtucket, but spent most of last year with Double-A Portland, compiling a combined .249/.326/.476 batting line with 16 homers and 53 RBIs.