Protect your collection of Seattle Mariners memorabilia with an array of display cases from MLB Shop. Featuring Mariners display cases for baseballs, jerseys, bats, hats, helmets, and more. Safeguard that foul ball your snagged at the ballpark in a Seattle Mariners baseball display case, or frame the jersey you had signed by your favorite player with a jersey display case. Grab a baseball bat display case or baseball cap display case to put your official Seattle Mariners collectibles. Visit the MLB Shop for all the best Seattle Mariners display cases.