The 25-year-old outfielder was one of three players who came from the Mariners in the trade, along with pitchers J.C. Ramirez and Phillippe Aumont.
Ramirez appeared in 18 games for the Phillies last season, posting a 7.50 ERA before being granted free agency and signing with the Indians last offseason. He's stationed at Cleveland's Triple-A affiliate.
Aumont is the lone player remaining with the organization. Aumont, though, allowed four runs in 1 2/3 innings when he was recalled to the Majors in early June. The 25-year-old right-hander has a 4.02 ERA at Triple-A this season.
Lee returned to the Phillies following the 2010 season after the Mariners traded him to Texas. He is on the disabled list with a strained left elbow.
Alex Halsted is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.