Winter Classic: Fenway Park transforms for Penguins vs. Bruins
Bruins, Penguins arrive at Winter Classic in vintage Red Sox, Pirates uniforms
A recent history of the Bruins' alternate and special edition jerseys
NHL Winter Classic - Wikipedia
NHL's Winter Classic: Bruins and Penguins players don Red Sox and Pirates gear at Fenway Park
DeBrusk scores 2 goals in 3rd, Bruins top Penguins in Winter Classic
Bruins players wear vintage Red Sox uniforms before Winter Classic
Bruins, Penguins arrive at Winter Classic in vintage Red Sox, Pirates uniforms
Here is the Washington Capitals Winter Classic jersey