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185 Items
Youth Seattle Mariners Majestic White Home Cool Base Jersey
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Sale: $41.24
Regular: $54.99
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Youth Seattle Mariners Majestic White Home Cool Base Jersey

Youth Seattle Mariners Navy Wordmark Full-Zip Hoodie
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Sale: $37.49
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Youth Seattle Mariners Navy Wordmark Full-Zip Hoodie

Youth Seattle Mariners Robinson Cano Majestic White Home Cool Base Player Jersey
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Sale: $44.99
Regular: $59.99
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Youth Seattle Mariners Robinson Cano Majestic White Home Cool Base Player Jersey

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Youth Seattle Mariners Majestic Navy Alternate Cool Base Jersey
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Youth Seattle Mariners Majestic Navy Alternate Cool Base Jersey

Youth Seattle Mariners Majestic Northwest Green Alternate Cool Base Jersey
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Youth Seattle Mariners Felix Hernandez Majestic Northwest Green Alternate Cool Base Player Jersey
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Youth Seattle Mariners Ken Griffey Jr. Majestic Navy Alternate Official Cool Base Player Jersey
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Sale: $44.99
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Youth Seattle Mariners Ken Griffey Jr. Majestic Navy Alternate Official Cool Base Player Jersey

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Youth Seattle Mariners JH Design Navy/Gray Reversible Hooded Jacket
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Sale: $67.49
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Youth Seattle Mariners JH Design Navy/Gray Reversible Hooded Jacket

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Youth Seattle Mariners Soft as a Grape Navy Sleeve Hit Long Sleeve T-Shirt
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Youth Seattle Mariners Felix Hernandez Navy Home Cool Base Player Jersey
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Youth Seattle Mariners Felix Hernandez Navy Home Cool Base Player Jersey

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Youth Seattle Mariners Majestic Cream Alternate Cool Base Jersey
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Sale: $41.24
Regular: $54.99
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Youth Seattle Mariners Majestic Cream Alternate Cool Base Jersey

Toddler Seattle Mariners Robinson Cano Majestic Alternate Aqua Official Cool Base Player Jersey
Sale: $33.74
Regular: $44.99
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Toddler Seattle Mariners Robinson Cano Majestic Alternate Aqua Official Cool Base Player Jersey

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Toddler Seattle Mariners Navy Primary Logo T-Shirt
Sale: $11.99
Regular: $15.99
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Toddler Seattle Mariners Navy Primary Logo T-Shirt

Newborn & Infant Seattle Mariners Soft as a Grape Navy/Gray 2-Piece Body Suit
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Infant Seattle Mariners Robinson Cano Majestic Alternate Teal Official Cool Base Player Jersey
Sale: $29.99
Regular: $39.99
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Infant Seattle Mariners Robinson Cano Majestic Alternate Teal Official Cool Base Player Jersey

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Newborn & Infant Seattle Mariners Navy Fan-tastic Baseball Bodysuit
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Regular: $17.99
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Newborn & Infant Seattle Mariners Navy Fan-tastic Baseball Bodysuit

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Youth Seattle Mariners Kyle Seager Majestic White Home Cool Base Player Jersey
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Sale: $44.99
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Youth Seattle Mariners Kyle Seager Majestic White Home Cool Base Player Jersey

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Youth Seattle Mariners Royal Blue Cooperstown T-Shirt
Sale: $16.49
Regular: $21.99
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Youth Seattle Mariners Royal Blue Cooperstown T-Shirt

Youth Seattle Mariners Teal Alternate All Meshed Up T-Shirt
Sale: $14.99
Regular: $19.99
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Youth Seattle Mariners Teal Alternate All Meshed Up T-Shirt

Youth Seattle Mariners Cream Hardball T-Shirt
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Regular: $18.99
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Youth Seattle Mariners Cream Hardball T-Shirt

Youth Seattle Mariners New Era Gray Meshed Flect 9FORTY Adjustable Hat
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Youth Seattle Mariners New Era Gray Meshed Flect 9FORTY Adjustable Hat

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Toddler Seattle Mariners Navy The Original 3/4-Sleeve T-Shirt
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Sale: $14.99
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Toddler Seattle Mariners Navy The Original 3/4-Sleeve T-Shirt

Infant Seattle Mariners Navy Primary Logo T-Shirt
Sale: $11.24
Regular: $14.99
You Save: $3.75

Infant Seattle Mariners Navy Primary Logo T-Shirt

Seattle Mariners Toddler Distressed Mascot T-Shirt - Navy Blue
Sale: $14.24
Regular: $18.99
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Seattle Mariners Toddler Distressed Mascot T-Shirt - Navy Blue

Best Seller in Kids T-Shirts
Newborn & Infant Seattle Mariners Majestic White Cool Base Romper Jersey
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Seattle Mariners Youth Distressed Logo T-Shirt - Navy Blue
Sale: $14.24
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Seattle Mariners Youth Distressed Logo T-Shirt - Navy Blue

Infant Seattle Mariners 2-Pack Pacifiers
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Sale: $7.49
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Infant Seattle Mariners 2-Pack Pacifiers

Preschool Seattle Mariners Majestic White Home Cool Base Team Jersey
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Girls Toddler Seattle Mariners White Bubbly Luv T-Shirt
Sale: $11.99
Regular: $15.99
You Save: $4.00

Girls Toddler Seattle Mariners White Bubbly Luv T-Shirt

Youth Seattle Mariners Kyle Seager Majestic Navy Player Name & Number T-Shirt
Sale: $16.49
Regular: $21.99
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Youth Seattle Mariners Kyle Seager Majestic Navy Player Name & Number T-Shirt

Best Seller in Kids T-Shirts
Youth Seattle Mariners Navy Team Logo Fleece Pullover Hoodie
Sale: $37.49
Regular: $49.99
You Save: $12.50

Youth Seattle Mariners Navy Team Logo Fleece Pullover Hoodie

Youth Seattle Mariners Navy Primary Logo T-Shirt
Sale: $14.99
Regular: $19.99
You Save: $5.00

Youth Seattle Mariners Navy Primary Logo T-Shirt

Seattle Mariners Kids Apparel

Shop for the very best in Seattle Mariners kids gear and apparel on MLB Shop. We have Seattle Mariners jerseys, shirts, baby creepers, toys, collectibles, and more for your child. Browse items perfect for newborn gifts all the way to older youth jerseys and apparel. Welcome your kids into the Seattle Mariners fan club with their very own gear and begin a fun tradition that can last a lifetime. Whether you're shopping for your kids or looking for an awesome gift, MLB Shop is your source for Seattle Mariners kids gear.