Penguins' Winter Classic jerseys have colorful history

The 1925 Pittsburgh PiratesThe Penguins will play in their sixth outdoor game on Monday, tying the Blackhawks for the most ever by any team in the NHL.

They've worn some pretty cool jerseys in the first five games, but these jerseys for Monday's game against the Bruins at Fenway Park undoubtedly has best backstory of them all.

The sweaters are inspired by the Pittsburgh Pirates -- not the baseball team, but rather Pittsburgh's first NHL team that played out of the Duquesne Gardens from 1925-30.

The 1925-26 season was the NHL's ninth year, and the league expanded from six to seven teams -- the Hamilton Tigers folded and the New York Americans joined the league that September. Pittsburgh was…