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Limited Time! Up to 65% Off Sitewide Sale + Free U.S. Shipping On Orders Over $29 USE Code: BAT1 *Exclusions Apply Excludes World Series Champs Gear Click for Details
1 - 72 of 186
186 Items
Youth Seattle Mariners Majestic Northwest Green Alternate Cool Base 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
Regular: $59.99
You Save: $15.00

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: $37.49
Regular: $49.99
You Save: $12.50

Youth Seattle Mariners Navy Team Logo Fleece Pullover Hoodie

Youth Seattle Mariners Majestic White Home Cool Base Jersey
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Sale: $41.24
Regular: $54.99
You Save: $13.75

Youth Seattle Mariners Majestic White Home Cool Base Jersey

Toddler Seattle Mariners Majestic White Official Cool Base Jersey
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Youth Seattle Mariners Robinson Cano Majestic White Home Cool Base Player Jersey
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Sale: $44.99
Regular: $59.99
You Save: $15.00

Youth Seattle Mariners Robinson Cano Majestic White 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
You Save: $13.75

Youth Seattle Mariners Majestic Cream Alternate Cool Base Jersey

Youth Seattle Mariners Felix Hernandez Majestic Northwest Green Alternate Cool Base Player Jersey
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Youth Seattle Mariners Felix Hernandez Navy Home Cool Base Player Jersey
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Sale: $44.99
Regular: $59.99
You Save: $15.00

Youth Seattle Mariners Felix Hernandez Navy Home Cool Base Player Jersey

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Youth Seattle Mariners Majestic Navy Alternate Cool Base Jersey
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Sale: $41.24
Regular: $54.99
You Save: $13.75

Youth Seattle Mariners Majestic Navy Alternate Cool Base Jersey

Youth Seattle Mariners Navy Wordmark Full-Zip Hoodie
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Sale: $37.49
Regular: $49.99
You Save: $12.50

Youth Seattle Mariners Navy Wordmark Full-Zip Hoodie

Youth Seattle Mariners White Home Replica Blank Team Jersey
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Sale: $41.24
Regular: $54.99
You Save: $13.75

Youth Seattle Mariners White Home Replica Blank Team Jersey

Youth Seattle Mariners JH Design Navy/Gray Reversible Hooded Jacket
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Sale: $67.49
Regular: $89.99
You Save: $22.50

Youth Seattle Mariners JH Design Navy/Gray Reversible Hooded Jacket

Best Seller in Jackets
Preschool Seattle Mariners Majestic Aqua Cool Base Official Team Jersey
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Newborn & Infant Seattle Mariners Navy Fan-tastic Baseball Bodysuit
Sale: $13.49
Regular: $17.99
You Save: $4.50

Newborn & Infant Seattle Mariners Navy Fan-tastic Baseball Bodysuit

Best Seller in Kids
Youth Seattle Mariners Royal Blue Cooperstown T-Shirt
Sale: $16.49
Regular: $21.99
You Save: $5.50

Youth Seattle Mariners Royal Blue Cooperstown T-Shirt

Toddler Seattle Mariners Majestic Northwest Green Official Cool Base Jersey
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Preschool Seattle Mariners Robinson Cano Majestic Alternate Teal Official Cool Base Player Jersey
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Toddler Seattle Mariners Navy Primary Logo T-Shirt
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Sale: $11.99
Regular: $15.99
You Save: $4.00

Toddler Seattle Mariners Navy Primary Logo T-Shirt

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

Seattle Mariners Toddler Distressed Mascot T-Shirt - Navy Blue

Best Seller in Kids T-Shirts
Toddler Seattle Mariners Robinson Cano Majestic Alternate Aqua Official Cool Base Player Jersey
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Sale: $33.74
Regular: $44.99
You Save: $11.25

Toddler Seattle Mariners Robinson Cano Majestic Alternate Aqua Official Cool Base Player Jersey

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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

Newborn & Infant Seattle Mariners Soft as a Grape Navy/Gray 2-Piece Body Suit
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Seattle Mariners Youth Distressed Logo T-Shirt - Navy Blue
Sale: $14.24
Regular: $18.99
You Save: $4.75

Seattle Mariners Youth Distressed Logo T-Shirt - Navy Blue

Youth Seattle Mariners Scuff Slide Slippers
Sale: $14.99
Regular: $19.99
You Save: $5.00

Youth Seattle Mariners Scuff Slide Slippers

Infant Seattle Mariners Robinson Cano Majestic Alternate Teal Official Cool Base Player Jersey
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Sale: $29.99
Regular: $39.99
You Save: $10.00

Infant Seattle Mariners Robinson Cano Majestic Alternate Teal Official Cool Base Player Jersey

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Infant Seattle Mariners 2-Pack Pacifiers
Sale: $7.49
Regular: $9.99
You Save: $2.50

Infant Seattle Mariners 2-Pack Pacifiers

Youth Seattle Mariners Under Armour Navy/Gray Electro Color Block T-Shirt
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Youth Seattle Mariners Majestic Heather Gray Wordmark Pullover Hoodie
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Youth Seattle Mariners Cream Hardball T-Shirt
Sale: $14.24
Regular: $18.99
You Save: $4.75

Youth Seattle Mariners Cream Hardball T-Shirt

Youth Seattle Mariners Stitches Heathered Charcoal Quarter-Zip Pullover Jacket
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Newborn & Infant Seattle Mariners White Personalized Bib
Sale: $17.24
Regular: $22.99
You Save: $5.75

Newborn & Infant Seattle Mariners White Personalized Bib

Youth Seattle Mariners Soft as a Grape Navy Pullover Hoodie
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Sale: $24.74
Regular: $32.99
You Save: $8.25

Youth Seattle Mariners Soft as a Grape Navy Pullover Hoodie

Newborn & Infant Seattle Mariners Majestic White Cool Base Romper Jersey
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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 Stitches Navy Property Of Team Hoodie
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Sale: $29.99
Regular: $39.99
You Save: $10.00

Youth Seattle Mariners Stitches Navy Property Of Team Hoodie

Youth Seattle Mariners Kyle Seager Majestic Navy Player Name & Number T-Shirt
Sale: $16.49
Regular: $21.99
You Save: $5.50

Youth Seattle Mariners Kyle Seager Majestic Navy Player Name & Number T-Shirt

Best Seller in Kids T-Shirts
Toddler Seattle Mariners Navy The Original 3/4-Sleeve T-Shirt
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Sale: $14.99
Regular: $19.99
You Save: $5.00

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

Seattle Mariners White Personalized Plush Baby Baseball
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Sale: $35.99
Regular: $47.99
You Save: $12.00

Seattle Mariners White Personalized Plush Baby Baseball

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.