The Arizona Diamondbacks today announced that they have acquired right-handed pitcher Jon Rauch from the Washington Nationals in exchange for infielder Emilio Bonifacio.

Rauch, 29, went 4-2 with a 2.98 ERA (16 ER in 48.1 IP) and 17 saves in 48 games out of the bullpen for the Nationals this season, walking seven and striking out 44.  He is tied for 10th in the National League with 17 saves and has finished 41 games, third in the NL.  Rauch’s 6.29 strikeout-to-walk ratio is the fourth-best in the Majors.

Bonifacio, 23, has appeared in eight games this season for the D-backs, batting .167 (2-for-12) with three runs scored, a double and two RBI.  He played in 85 games for Tucson (AAA) before being recalled on July 4, batting .302 (111-for-367) with 49 runs scored, 18 doubles, five triples, a home run, 29 RBI and 17 stolen bases.  Bonifacio was named to the Pacific Coast League All-Star team and was named to the World Team in the Major League Baseball Futures Game.