The Braves have brought in the 27-year-old Pena to provide some insurance for backup shortstop Paul Janish.
Janish, who was also just signed to a one-year deal, recently underwent surgery to repair a torn labrum on his non-throwing shoulder and may miss the start of the season. In addition to shortstop, Pena has played third base and second base, so he can fill in at those positions if need be.
Pena spent his first four seasons in the big leagues with the New York Yankees. He played in 85 games for the Yankees in 2010, and is much more well known for his glove than his bat. Pena hit .227 with zero home runs and 18 RBI in 2010 and hit .233 in 180 total games with the Yankees. He has played in just 26 games the last two seasons, including only three last year.
Pena is currently playing the Mexican Pacific League, where he's hitting .308 with a .430 on-base percentage in 48 games.