Ronald Belisario sits on a 3.22 ERA through 23 appearances.
Josh Tomlin (Tommy John surgery) could return near the end of the season.
Martin Maldonado has regressed at the plate in 2013, slashing .184/.253/.303 over 83 plate appearances.
Antonio Bastardo has a 2.35 ERA through 19 appearances despite a mediocre 1.43 WHIP.
Over 19 relief appearances, Charlie Furbush owns a 4.42 ERA in 18 1/3 innings.
Tyler Clippard hasn't allowed a run in May.
Joaquin Arias has been one of baseball's worst hitters, slashing .205/.262/.205 through 43 plate appearances.
Jason Frasor has tallied a 3.65 ERA through 17 appearances in his first season for the Rangers.