Swisher entered Sunday's American League Division Series Game 1 against the Orioles having batted just .160 (16-for-100) with four homers and five RBIs in 28 postseason games with the Yankees dating back to 2009, including four hits in 19 at-bats against the Tigers in last year's ALDS.
"I think we've really been in a playoff-type atmosphere the last month," Swisher said, "and I really feel like I've done well. I'm done stressing about this, man. This could be my last hurrah here, man, so I'm just going to keep going out there and doing everything I have to do."
Swisher, 31, batted .272 with 24 homers and 93 RBIs in 148 games during the regular season. He is eligible for free agency for the first time after the playoffs, and it is uncertain that the Yankees would offer a multiyear contract to keep the popular outfielder in pinstripes.
New York's front office has talked about wanting to reduce its payroll below $189 million for the 2014 season, while also speaking about plans to offer contract extensions to second baseman Robinson Cano and outfielder Curtis Granderson.
"We'll see. At the end of the season, we'll figure it out," Swisher said. "I've talked about that. It's not like no one knows about it. It could be [the end], man, so let's make the most of it."