Ebbets Field Flannels makes replicas of vintage baseball jerseys from various leagues (including Cuban and Japanese jerseys), using new-old vintage textiles for their projects. They also do hockey jerseys, hats, and other replicas of bygone-era sportswear.
The Stanley Cup used to be an open tournament which included non-NHL teams. In 1917, the Seattle Metropolitans of the PCHA became the first U.S. team to win the cup when they defeated the Montreal Canadiens three games to one. Several different versions of this barber-pole striped sweater were worn through the years.
(via Kottke)