Chipper Jones has the most career postseason games played for a National League player with 92.
Manny Ramirez is the top active non-Yankees player with the most postseason appearances with 111 games played.
Through game 1 of the 2010 playoffs, Derek Jeterhas made the most postseason appearances. He has played in 139 games.
As of the start of the 2007 postseason, Bernie Williams had played the most postseason games in MLB history with 121. However, Derek Jeter had played 119 games in the postseason and, barring injury, will pass Williams for the #1 spot if he plays 3 games in the 2007 postseason.
Bernie Williams , 121 games.
As of the start of the 2007 season, no MLB player has hit for the cycle in the postseason.
None, there has never been a female player in Major League baseball.
MLB teams are allowed to adjust their rosters between, but not during, postseason series. So, an injured player would stay on the roster for the rest of the series even if he's unable to play; after that, the team could replace him on the roster before the start of the next series.
Manny Ramirez has the most postseason games played as a non-member of the Yankees. He played in 111 games.