The 2026 Topps Series 1 Celebration Mariner Moose #MAS-MOS Mascot Jersey Relic Card is a collectible trading card featuring a piece of memorabilia from the Seattle Mariners mascot, Mariner Moose. This card is part of the 2026 Topps set and is a special variety called a Relic Card, making it a unique addition to any Major League Baseball card collection. As a sports trading card, this item is perfect for fans of baseball and the Seattle Mariners, especially those who appreciate the history and tradition of the team.