LeBron meets the Celtics again in the postseason

CLEVELAND, OH - APRIL 21: Isaiah Thomas #4 of the Boston Celtics drives around LeBron James #23 of the Cleveland Cavaliers in the second half in Game Two of the Eastern Conference Quarterfinals during the 2015 NBA Playoffs 2015 at Quicken Loans Arena on April 21, 2015 in Cleveland, Ohio. The Cavaliers defeated the Celtics 99-91. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Jason Miller/Getty Images)

INDEPENDECE, Ohio (AP) -- LeBron James peeled off his practice jersey to reveal a T-shirt featuring a leprechaun on the front.

His clothing choice was fitting in all ways -- the Celtics are up next.

James has a long playoff history with the Celtics. He'll meet them again Wednesday when the Cavaliers open the Eastern Conference finals in Boston. Cleveland hasn't lost in the postseason and hasn't played since sweeping Toronto on May 7.

James has won three championships and some of his most memorable postseason games came against the Celtics. This will be the sixth time James has faced Boston in the playoffs -- more than any other team

James has a deep appreciation for the Celtics' history and mystique. He says that while playing in Boston he has looked toward the rafters to admire the retired jerseys and 17 championship banners.