You have only one chance to make a good first impression, and Daniel Murphy has done just that in his first postseason. The inherent nature of the playoffs -- a mere few weeks and not a 26-week regular season -- ensures that there always will be some non-stars that grab the headlines each year.
There's little question that Murphy is a big reason why the Mets are just two wins away from returning to the World Series for the first time since 2000's disappointing Subway Series loss to the Yankees in five games. In seven games so far this postseason, he has hit five home runs, a number which by itself already ranks his 2015 postseason performance highly in playoff history. The record for homers in a postseason is eight, jointly held by Barry Bonds (2002), Carlos Beltran (2004) and Nelson Cruz (2011), and they needed 17, 12 and 17 games, respectively, to hit those marks. At five homers, Murphy's figure is in a 20-way tie for 20th all time, and of the other 19 players, 18 of them required more plate appearances to get their five dingers. The lone exception is Juan Gonzalez, who hit five homers in four games for the Texas Rangers in their 1996 ALDS loss to the Yankees.
Looking at win probability added -- a measure that takes into account the game situation as well as the raw performance, which is something I find philosophically more interesting in the playoff sprint rather than the regular-season marathon -- Murphy's postseason already ranks among the best in baseball history. To get a more accurate measure and try to avoid a list that's dominated by pinch-hitters who came through in one big moment, I also use the leverage index to calculate what FanGraphs calls Context-Neutral Wins.
In terms of Context Neutral Wins, Murphy already has one of the top 50 postseasons among hitters in modern history (going back to the first official World Series in 1903). Incidentally, Murphy is not alone in already entering the top 50; he's joined by Cubs rookie Kyle Schwarber. Below is the full list, and keep in mind the more games in which to accumulate stats the better, which is why most of the top performances have happened since the Division Series round was added in 1995: