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06/07/08 12:41 AM ET

Rowand leaves with tight quadriceps

Outfielder is replaced by Horwitz in seventh inning

WASHINGTON -- Giants center fielder Aaron Rowand is listed as day-to-day after coming out of Friday's 10-1 win over Washington with a tight right quadriceps in the seventh inning.

Rowand ended the sixth inning by making a long running catch of a Lastings Milledge fly ball, and that's when he felt it. He said later that it was similar to what cost him a few days in Spring Training. Manager Bruce Bochy said that they'll check on him before Saturday's game.

"We didn't take any chances," Bochy said.

Jeff Seidel is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.