The Phillieshave decidednot to extend the contract of senior vice president and general manager Ruben Amaro Jr., Thursday.The clubhas named a sistant general manager Scott Proefrock as interim general manager andwill "immediately begin" Paul Worrilow Jersey searching for Amaro's permanent replacement.MORE: The move comes as no surprise after the clubhired veteran baseball executive Andy MacPhail as its president of baseball operations in June."It's never an easy decision to make a change," MacPhail Lane Johnson Jersey said in a statement. "Ruben has had a direct impact on some of the best years in the team's history. He helped to create some great memories for Phillies fans with his accomplishments, Tommy McDonald Jersey but in order to return to a top-contending club, we believe this is the right thing to do Corey Clement Jersey as we continue the rebuilding proce s."Amaro, 50, took over as Philadelphia's general manager in November 2008 after serving as a sistant general manager for a decade. Heplayed eight seasons in the majors as an outfielder, including three with the Phillies, prior to joining Philadelphia's front office.The Phillies sit dead last in the majors with a 54-86 record in a season that saw from Shareef Miller Jersey his position before the All-Star break.