The Washington Nationals today recalled right-handed pitcher Ryan Mattheus from Syracuse of the Triple-A International League and optioned left-handed pitcher Xavier Cedeno to Syracuse. Nationals President of Baseball Operations and General Manager Mike Rizzo made the announcement.

Mattheus is 0-1 with five holds and a 6.26 ERA in 23 games with Washington this season. The 29-year-old allowed just one earned run with three strikeouts (no walks) in 5.1 innings during his five-appearance stint with Syracuse. In 11 games this season with the Chiefs, he posted a 2.03 ERA and .255 BAA in 13.1 innings. 

Cedeno, 27, has not allowed a run in two relief appearances (1.1 innings pitched) with Washington. He is 0-0 with a 9.39 ERA in seven relief appearances this season with the Nationals and Houston Astros.