PHILADELPHIA (CBS) — Austin Hays is back with the Philadelphia Phillies after missing 13 games with a strain of the left thighOn Friday, the Phillies activated Hays from the 10-day injured list ahead of their series opener against the Royals in Kansas City.

Philadelphia sent outfielder Cal Stevenson back to Triple A Lehigh Valley to make room for Hays on its 26-man roster.

Hays, 29, suffered a thigh strain during the 9-4 victory for the Phillies against the Dodgers in Los Angeles on August 7. Two days later, retroactive to August 8, he was placed on the 10-day IL.

The Phillies acquire Hays from the Baltimore Orioles a few days before the trade deadline on July 30th.

Hays played 10 games with the Phillies prior to his injury, posting a .263 batting average with a .677 on-base-plus-slugging percentage (OPS), one home run, two doubles and five runs scored. He played in two rehab games with the IronPigs, reaching base three times in seven plate appearances.

Stevenson, 27, played seven games for the Phillies, collecting two hits and two walks.

The Phillies have not yet announced their lineup for their first game of the series against the Royals at Kauffman Stadium. Taijuan Walker (3-4, 5.69) is scheduled to face Kansas City starter Michael Wacha (10-6, 3.33).