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1 - 72 of 189
Kids
189 Items
Youth Seattle Mariners Ken Griffey Jr. Aqua Player Replica Jersey
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Youth Seattle Mariners Ken Griffey Jr. Majestic Alternate Aqua Official Cool Base Player Jersey
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Sale: $40.19Regular: $59.99You Save: $19.80

Youth Seattle Mariners Ken Griffey Jr. Majestic Alternate Aqua Official Cool Base Player Jersey

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Youth Seattle Mariners Stitches Navy Team Fleece Pullover Hoodie
Sale: $16.00Regular: $39.99You Save: $23.99

Youth Seattle Mariners Stitches Navy Team Fleece Pullover Hoodie

Youth Seattle Mariners Majestic Navy Alternate Cool Base Jersey
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Sale: $32.99Regular: $54.99You Save: $22.00

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 Ken Griffey Jr. Majestic White Home Official Cool Base Player Jersey
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Youth Seattle Mariners Navy Team Color Wordmark Full-Zip Hoodie
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Sale: $33.74Regular: $44.99You Save: $11.25

Youth Seattle Mariners Navy Team Color Wordmark Full-Zip Hoodie

Youth Seattle Mariners Majestic Cream Alternate Cool Base Jersey
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Sale: $32.99Regular: $54.99You Save: $22.00

Youth Seattle Mariners Majestic Cream Alternate Cool Base Jersey

Youth Seattle Mariners Under Armour Navy LC Logo Quarter-Zip Pullover Jacket
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Youth Seattle Mariners Stitches Heathered Charcoal Quarter-Zip Pullover Jacket
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Youth Seattle Mariners Navy Primary Logo Pullover Hoodie
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Sale: $37.49Regular: $49.99You Save: $12.50

Youth Seattle Mariners Navy Primary Logo Pullover Hoodie

Newborn & Infant Seattle Mariners Navy/Aqua/Gray Everyday Fan Three-Pack Bodysuit Set
Sale: $22.49Regular: $29.99You Save: $7.50

Newborn & Infant Seattle Mariners Navy/Aqua/Gray Everyday Fan Three-Pack Bodysuit Set

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Youth Seattle Mariners New Era Navy On-Field Sport Knit Hat
Sale: $17.99Regular: $23.99You Save: $6.00

Youth Seattle Mariners New Era Navy On-Field Sport Knit Hat

Newborn & Infant Seattle Mariners Majestic White Cool Base Romper Jersey
Sale: $20.99Regular: $34.99You Save: $14.00

Newborn & Infant Seattle Mariners Majestic White Cool Base Romper Jersey

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Toddler Seattle Mariners White/Navy Little Hitter V-Neck T-Shirt & Shorts Set
Sale: $23.99Regular: $31.99You Save: $8.00

Toddler Seattle Mariners White/Navy Little Hitter V-Neck T-Shirt & Shorts Set

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Youth Seattle Mariners New Era Navy Threads 9FIFTY Adjustable Hat
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Youth Seattle Mariners Cream Hardball T-Shirt
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Sale: $14.24Regular: $18.99You Save: $4.75

Youth Seattle Mariners Cream Hardball T-Shirt

Girls Youth Seattle Mariners New Era Navy Blossom 9TWENTY Adjustable Hat
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Youth Seattle Mariners Teal Alternate All Meshed Up T-Shirt
Sale: $14.99Regular: $19.99You Save: $5.00

Youth Seattle Mariners Teal Alternate All Meshed Up T-Shirt

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

Youth Seattle Mariners Navy Primary Team Logo T-Shirt

Youth Seattle Mariners New Era Blue 2017 Players Weekend 59FIFTY Fitted Hat
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Toddler Seattle Mariners Navy Team Primary Logo T-Shirt
Sale: $11.99Regular: $15.99You Save: $4.00

Toddler Seattle Mariners Navy Team Primary Logo T-Shirt

Seattle Mariners Toddler Distressed Mascot T-Shirt - Navy Blue
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Sale: $14.24Regular: $18.99You Save: $4.75

Seattle Mariners Toddler Distressed Mascot T-Shirt - Navy Blue

Youth Seattle Mariners Stance Alternate Logo Diamond Pro Socks
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Youth Seattle Mariners Majestic White Home Cool Base Jersey
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Sale: $32.99Regular: $54.99You Save: $22.00

Youth Seattle Mariners Majestic White Home Cool Base Jersey

Youth Seattle Mariners New Era Navy On-Field Sport Cuffed Knit Hat
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Girls Youth Seattle Mariners Under Armour Navy/White Baseball Half-Sleeve T-Shirt
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Girls Toddler Seattle Mariners Majestic White Triple Heart T-Shirt
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Youth Seattle Mariners Big Logo Scuff Slippers
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Sale: $10.00Regular: $19.99You Save: $9.99

Youth Seattle Mariners Big Logo Scuff Slippers

Youth Seattle Mariners Soft as a Grape Navy Around the Horn Hoodie
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Youth Seattle Mariners Majestic Navy City Wide Cool Base T-Shirt
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Infant Seattle Mariners Navy Primary Logo T-Shirt
Sale: $11.24Regular: $14.99You Save: $3.75

Infant 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.