Through the 2009 season, that is the Texas Rangers franchise. They have made the postseason three times and lost all three times to the Yankees.
Since MLB went to divisional play in 1969, the only team that went undefeated in the postseason was the 1976 Cincinnati Reds who swept the Phillies in the NLCS and the Yankees in the World Series.
New york yankees
That team never made the MLB World Series.
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.
Major League Baseball has a five game series for their postseason, but only for the Division Series. MLB's League Championship Series and World Series is the best-of-seven.The NBA and NHL are both best-of-seven series throughout the postseason.
In the MLB, Washington Nationals, Seattle Mariners, and Texas Rangers.
After this year there is only ONE active MLB team that's NEVER appeared in a World Series... That team is The SEATTLE MARINERS (Only team that's never won their Pennant)
162 by each team.
Derek Jeter (aka Mr. November) holds the record for most postseason appearances. He's played in 158 postseason games with a .309 career postseason batting average. The New York Yankees have made it to the postseason every year since Jeter joined the team, with the exceptions of 2008 and 2013.
Written in the stars
Aerosmith
Most RBIs in a single postseason, 21.