WASHINGTON (AP) -The Nationals optioned left-hander Mike O'Connor to Triple-A Columbus after Washington's 5-4 loss to the Florida Marlins on Sunday and recalled right-hander Chris Schroder from the Clippers.
O'Connor allowed nine runs in 3 1-3 innings in Washington's 11-0 loss to Florida on Saturday and was 1-1 with a 13.00 ERA in five games. Saturday's start was his first in the major leagues since Sept. 28, 2006.
Schroder pitched in two games with the Nationals earlier this season. He has no record and a 3.38 ERA. Schroder is 2-1 with a 1.26 ERA in 10 games with Columbus.












