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1 - 72 of 166
166 Items
Youth Seattle Mariners Stitches Navy Fleece Pullover Hoodie
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Sale: $16.00
Regular: $39.99
You Save: $23.99

Youth Seattle Mariners Stitches Navy Fleece Pullover Hoodie

Youth Seattle Mariners Ken Griffey Jr. Majestic Navy Alternate Official Cool Base Player Jersey
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Sale: $41.99
Regular: $59.99
You Save: $18.00

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

Best Seller in Jerseys
Youth Seattle Mariners Navy Team Logo Fleece Pullover Hoodie
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Sale: $34.99
Regular: $49.99
You Save: $15.00

Youth Seattle Mariners Navy Team Logo Fleece Pullover Hoodie

Youth Seattle Mariners Ken Griffey Jr. Majestic White Home Official Cool Base Player Jersey
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Youth Seattle Mariners Majestic Navy Alternate Cool Base Jersey
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Sale: $38.49
Regular: $54.99
You Save: $16.50

Youth Seattle Mariners Majestic Navy Alternate Cool Base Jersey

Youth Seattle Mariners JH Design Navy/Gray Reversible Hooded Jacket
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Sale: $62.99
Regular: $89.99
You Save: $27.00

Youth Seattle Mariners JH Design Navy/Gray Reversible Hooded Jacket

Best Seller in Jackets
Youth Seattle Mariners Ken Griffey Jr. Majestic Navy Cooperstown Name & Number T-Shirt
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Youth Seattle Mariners Royal Blue Cooperstown T-Shirt
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Sale: $15.39
Regular: $21.99
You Save: $6.60

Youth Seattle Mariners Royal Blue Cooperstown T-Shirt

Youth Seattle Mariners Ken Griffey Jr. Majestic Cream Alternate Official Cool Base Player Jersey
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Preschool Seattle Mariners Ken Griffey Jr. Aqua Official Cool Base Performance Player Jersey
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Youth Seattle Mariners Stitches Navy/Teal Team Jersey
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Sale: $18.00
Regular: $46.00
You Save: $28.00

Youth Seattle Mariners Stitches Navy/Teal Team Jersey

Newborn & Infant Seattle Mariners Majestic Alternate Navy Cool Base Romper Jersey
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Youth Seattle Mariners Majestic Northwest Green Alternate Cool Base Jersey
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Youth Seattle Mariners Soft as a Grape Navy Around the Horn Hoodie
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Youth Seattle Mariners Felix Hernandez Majestic Northwest Green Alternate Cool Base Player Jersey
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Toddler Seattle Mariners Soft As A Grape Royal Cooperstown Collection Shutout T-Shirt
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Preschool Seattle Mariners Majestic Aqua Cool Base Official Team Jersey
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Youth Seattle Mariners Navy Primary Logo T-Shirt
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Sale: $13.99
Regular: $19.99
You Save: $6.00

Youth Seattle Mariners Navy Primary Logo T-Shirt

Girls Youth Seattle Mariners New Era Navy Floral Peek 9TWENTY Adjustable Hat
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Youth Seattle Mariners Majestic White Home Cool Base Jersey
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Sale: $38.49
Regular: $54.99
You Save: $16.50

Youth Seattle Mariners Majestic White Home Cool Base Jersey

Newborn & Infant Seattle Mariners Ken Griffey Jr. Majestic Navy Stitched Player Name & Number Bodysuit
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Youth Seattle Mariners Ichiro Suzuki Majestic Navy Name & Number T-Shirt
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Youth Seattle Mariners New Era Royal Authentic Collection On-Field Alternate 2 59FIFTY Fitted Hat
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Youth Seattle Mariners New Era Navy The League 9Forty Adjustable Hat
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Youth Seattle Mariners Under Armour Navy Tech Long Sleeve T-Shirt
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Youth Seattle Mariners New Era Navy On-Field Sport Cuffed Knit Hat
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Newborn & Infant Seattle Mariners Navy Fan-tastic Baseball Bodysuit
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Sale: $12.59
Regular: $17.99
You Save: $5.40

Newborn & Infant Seattle Mariners Navy Fan-tastic Baseball Bodysuit

Best Seller in Kids
Youth Seattle Mariners Cream Hardball T-Shirt
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Sale: $13.29
Regular: $18.99
You Save: $5.70

Youth Seattle Mariners Cream Hardball T-Shirt

Youth Seattle Mariners New Era Navy/Aqua Legendary 24 39THIRTY Flex Hat
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Youth Seattle Mariners Majestic Cream Alternate Cool Base Jersey
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Sale: $38.49
Regular: $54.99
You Save: $16.50

Youth Seattle Mariners Majestic Cream Alternate Cool Base Jersey

Toddler Seattle Mariners Navy/Teal Ground Rules T-Shirt & Shorts Set
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Toddler Seattle Mariners Ken Griffey Jr. Majestic Navy Snack Attack Name & Number T-Shirt
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Youth Seattle Mariners Jersey Slippers
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Sale: $10.49
Regular: $14.99
You Save: $4.50

Youth Seattle Mariners Jersey Slippers

Youth Seattle Mariners Stitches Heathered Charcoal Quarter-Zip Pullover Jacket
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Seattle Mariners WinCraft 2-Pack Bib Set
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Sale: $9.20
Regular: $21.99
You Save: $12.79

Seattle Mariners WinCraft 2-Pack Bib Set

Youth Seattle Mariners Teal Alternate All Meshed Up T-Shirt
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Sale: $13.99
Regular: $19.99
You Save: $6.00

Youth Seattle Mariners Teal Alternate All Meshed Up T-Shirt

Infant Seattle Mariners Soft as a Grape Navy 3-Pack Rookie Bodysuit Set
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Toddler Seattle Mariners Navy Primary Logo T-Shirt
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Sale: $11.19
Regular: $15.99
You Save: $4.80

Toddler Seattle Mariners Navy Primary Logo T-Shirt

Infant Seattle Mariners White/Navy Good Hit Henley T-shirt & Shorts Set
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Newborn Seattle Mariners White Baseball Kid Bodysuit, Bib & Booties Set
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Seattle Mariners Youth Distressed Logo T-Shirt - Navy Blue
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Sale: $13.29
Regular: $18.99
You Save: $5.70

Seattle Mariners Youth Distressed Logo T-Shirt - Navy Blue

Toddler Seattle Mariners Majestic White Official Cool Base Jersey
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Youth Seattle Mariners White/Navy Game Day Jersey T-Shirt
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Sale: $20.99
Regular: $29.99
You Save: $9.00

Youth Seattle Mariners White/Navy Game Day Jersey T-Shirt

Girls Newborn & Infant Seattle Mariners Navy/White Play with Heart Two-Pack Bodysuit Set
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Seattle Mariners Toddler Distressed Mascot T-Shirt - Navy Blue
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Sale: $13.29
Regular: $18.99
You Save: $5.70

Seattle Mariners Toddler Distressed Mascot T-Shirt - Navy Blue

Best Seller in Kids T-Shirts
Youth Seattle Mariners Ichiro Suzuki Majestic Aqua Alternate Cool Base Replica Player Jersey
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Youth Seattle Mariners New Era Navy Authentic Collection On-Field Game 59FIFTY Fitted Hat
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Youth Seattle Mariners Scuff Slide Slippers
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Sale: $8.00
Regular: $19.99
You Save: $11.99

Youth Seattle Mariners Scuff Slide Slippers

Girls Toddler Seattle Mariners White Bubbly Luv T-Shirt
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Sale: $11.19
Regular: $15.99
You Save: $4.80

Girls Toddler Seattle Mariners White Bubbly Luv T-Shirt

Newborn Seattle Mariners Royal/Yellow Baseball Star Two-Pack Bodysuit Set
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Youth Seattle Mariners Under Armour Navy Charged T-Shirt
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Sale: $20.99
Regular: $29.99
You Save: $9.00

Youth Seattle Mariners Under Armour Navy Charged T-Shirt

Youth Seattle Mariners New Era Navy/Aqua Authentic Collection On-Field Alternate 59FIFTY Fitted Hat
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Youth Seattle Mariners Felix Hernandez Majestic Navy Player Name & Number T-Shirt
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Youth Seattle Mariners Stitches White/Navy 3/4-Sleeve Raglan T-Shirt
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Youth Seattle Mariners Ichiro Suzuki Majestic White Home Cool Base Replica Player Jersey
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Toddler Seattle Mariners Majestic Northwest Green Official Cool Base Jersey
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Youth Seattle Mariners Nelson Cruz Majestic Navy Player Name & Number T-Shirt
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Toddler Seattle Mariners Navy The Original 3/4-Sleeve T-Shirt
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Sale: $13.99
Regular: $19.99
You Save: $6.00

Toddler Seattle Mariners Navy The Original 3/4-Sleeve T-Shirt

Youth Seattle Mariners Soft as a Grape Navy Sleeve Hit Long Sleeve T-Shirt
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Youth Seattle Mariners New Era Blue 2017 Players Weekend 59FIFTY Fitted Hat
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Youth Seattle Mariners Majestic Gray Life or Death Henley T-Shirt
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Youth Seattle Mariners Under Armour Navy/Gray Electro Color Block T-Shirt
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Youth Seattle Mariners Soft as a Grape Aqua Cotton Crew Neck T-Shirt
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Youth Seattle Mariners Under Armour Navy Performance Tech T-Shirt
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Infant Seattle Mariners Navy Primary Logo T-Shirt
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Sale: $10.49
Regular: $14.99
You Save: $4.50

Infant Seattle Mariners Navy Primary Logo T-Shirt

Newborn & Infant Seattle Mariners Majestic White Cool Base Romper Jersey
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Toddler Girls Seattle Mariners Soft as a Grape Pink Polka Dot Logo T-Shirt
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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.