NEW YORK - (AP) - Sandy Alderson has been introduced as generalmanager of the New York Mets, taking over an underachieving teamloaded with question marks on and off the field. Alderson beat out former Arizona Diamondbacks GM Josh Byrnes toreplace Omar Minaya. He was fired along with manager Jerry Manuelin a major shakeup following the Mets' fourth consecutive seasonwithout a playoff berth. The 62-year-old former Marine and Harvard Law School graduatereturns to a role he hasn't held since 1997, when Alderson ended along and successful tenure as Oakland Athletics general manager. He has plenty of work to do in New York, where he inherits ahigh-priced roster beset by injured stars. First up, finding the Mets' next manager.