Nomar Garciaparra will announce his retirement at a Red Sox press conference this morning, tweets ESPN's Gordon Edes. WEEI's Lou Merloni (via Twitter) says Garciaparra is signing a one-day minor league contract with Boston to retire as a member of the club. Nomar, 36, finishes with a sparkling career line of .313/.361/.521 in 6,116 plate appearances. He spent the majority of his time at shortstop, though also played the infield corners later in his career. Garciaparra was a superstar with the Red Sox, winning Rookie of the Year in '97 and getting MVP votes and All-Star appearances in six different seasons.