Normally, one player stands out as the undisputed key to a team's championship run.
Last year, Madison Bumgarner stepped up and helped lead the San Francisco Giants to a third World Series title in five years.
Before that, David Ortiz launched a monster shot off Joaquin Benoit to help the Boston Red Sox gain momentum, surge past the Detroit Tigers and eventually win a championship.
Can someone put together a similar performance in 2015 and live in postseason lore forever?
Let's take a look at a critical player for each playoff team.