Bryce Harper to move back to outfield after Luis Arraez trade

PHILADELPHIA — Bryce Harper has been saying for years that he’d move back to the outfield if the right situation presented itself.

Well, the Phillies are finally taking him up on it.

“The key for me is Harp,” interim manager Don Mattingly said prior to Monday night’s game against the Nationals at Citizens Bank Park. “Harp moving to the outfield is really the key to this. It kind of solidifies…