WASHINGTON -- Philadelphia Phillies manager Rob Thomson said Thursday that he will use a six-man rotation beginning this weekend when Aaron Nola returns from the injured list.

Nola is lined up for the series finale Sunday at Washington . The 32-year-old right-hander is coming back from a right ankle sprain.

Left-hander Ranger Suárez takes the mound Monday against the Seattle Mariners . The National League East leaders also have ace right-hander Zack Wheeler , lefties Cristopher Sánchez and Jesús Luzardo , and right-hander Taijuan Walker .

Thomson said he isn't sure how long he is going to use the six-man rotation.

"Once for sure, and then we've got some other ideas how to attack this thing as we move forward," he said.

Philadelphia starters lead the majors with 693⅓

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