Longtime Yankees catcher Jorge Posada is expected to hold a news conference at Yankee Stadium early this week to announce his retirement, according to a person familiar with the plans. Earlier this month, it was widely reported that the 40-year-old had decided to end his career. Those plans did not change when the Yankees later agreed to trade Jesus Montero - slotted to be the designated hitter in 2012 - to Seattle for pitcher Michael Pineda.