Answer the following question: Facts: - caption: zduriencik in 2011 - occupation: general manager - birth date: 11 january 1951 - name: jack zduriencik - nationality: american - image: jack zduriencik 2011.jpg - birth place: new castle , pennsylvania - alma mater: california university of pennsylvania Based on these bullet points, write a short biography describing the life of jack zduriencik .
Answer:
john a. '' jack '' zduriencik -lrb- ; born january 11 , 1951 -rrb- is the former general manager of major league baseball 's seattle mariners .