It is Ruf's first time in left field with the Phillies this season. He played 60 games there for Triple-A Lehigh Valley.
"He's taken some balls there [during batting practice]," Maneul said. "He took some extra in BP today, too. He's been playing there supposedly. I guess. That's what they tell me. Think I can go on what they tell me?"
Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.