Andrew Miller is proving his 2012 breakout was no fluke, posting a 3.86 ERA and 24/8 K/BB rate over 20 appearances.
Glen Perkins blew his first save of the season in Tuesday's 5-4, extra-innings loss to the Braves.
Troy Patton holds a 4.05 ERA over 18 appearances.
Wil Nieves has just one hit since April 25.
Pablo Sandoval hit a walkoff homer off Yunesky Maya in the 10th inning Tuesday as the Giants beat the Nationals 4-2.
Stephen Strasburg pitched seven innings of one-run ball, striking out seven, in a no-decision against the Giants on Tuesday.
Rafael Soriano took his third blown save after giving up a run in the ninth against the Giants on Tuesday.
Danny Espinosa went hitless in a fourth straight game Tuesday, leaving him with a .159 average in 139 at-bats.