WASHINGTON -- The Phillies shook up their lineup Tuesday against the Nationals.
Phillies manager Ryne Sandberg had Jimmy Rollins hit first, Chase Utley second and Marlon Byrd third. Ben Revere hit eighth.
Domonic Brown, whose .576 OPS entering Tuesday ranked 170th out of 174 qualifying hitters in baseball, remained in the lineup. He hit sixth and singled in his first at-bat.
"I'd like to see him show the potential that he has," Sandberg said of Brown. "That goes for everybody, doing the job, for us as a group to be more consistent."
Brown also is on pace to have one of the worst seasons for a left fielder in the past 25 years. His .582 OPS in left field currently ranks 574th out of 578 qualifying left fielders from 1989-2014.
Aumont optioned to Triple-A; Martin recalled
WASHINGTON -- After a pair of shaky performances this week, the Phillies optioned right-hander Phillippe Aumont to Triple-A Lehigh Valley on Tuesday.
The club recalled right-hander Ethan Martin to take his place.
"He can give us some help right now," Phillies manager Ryne Sandberg said. "He's just an added arm, and we're sticking with four guys on the bench. He was the next guy in line to get us through these days and help our bullpen."
The Phils had just promoted Aumont on Sunday morning after a couple of extra-inning games against the Mets left them shorthanded in the bullpen. But Aumont allowed four runs -- including two home runs -- with two walks and three strikeouts in 1 2/3 innings. He took the loss Sunday and allowed a grand slam Monday.
Martin had a 1.69 ERA in eight appearances for Lehigh Valley. He started the season on the disabled list with a right shoulder injury. His velocity isn't where it once was, but the Phillies hope he can pitch effectively.
Triple-A right-hander Ken Giles was not in the conversation Sunday when the Phillies called up Aumont and left-hander Cesar Jimenez, but Sandberg said his name came up before Martin's promotion. Giles, who hits 100 mph with his fastball, has eight strikeouts and seven walks in 12 2/3 innings in Triple-A, compared with 29 strikeouts and five walks in 15 innings in Double-A.
"Giles is coming along fine," Sandberg said. "He's coming along. He's not in uniform today, but he's progressing."
• Left-hander Jeremy Horst cleared waivers and has accepted his assignment to Triple-A. He will be available to pitch Wednesday. The Phillies designated him for assignment Sunday.
• Third baseman Cody Asche, who is on the disabled list with a strained left hamstring, began jogging Tuesday.
• Triple-A left fielder Darin Ruf sustained a sprained left wrist and right knee laceration Tuesday when sliding into a wall while pursuing a foul ball. It is unknown how much time he might miss.
Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.