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1 - 72 of 196
Kids
196 Items
Youth Seattle Mariners Ken Griffey Jr. Majestic Alternate Aqua Official Cool Base Player Jersey
Sale: $39.99Regular: $59.99You Save: $20.00

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

Most Popular in Jerseys
Youth Seattle Mariners Ken Griffey Jr. Aqua Player Replica Jersey
$41.99 with codeRegular: $59.99You Save: $18.00

Youth Seattle Mariners Ken Griffey Jr. Aqua Player Replica Jersey

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

Youth Seattle Mariners Stitches Navy Team Fleece Pullover Hoodie

Youth Seattle Mariners Soft as a Grape Aqua Cotton Crew Neck T-Shirt
$15.39 with codeRegular: $21.99You Save: $6.60

Youth Seattle Mariners Soft as a Grape Aqua Cotton Crew Neck T-Shirt

Youth Seattle Mariners Majestic Navy Alternate Cool Base Jersey
Sale: $39.99Regular: $54.99You Save: $15.00

Youth Seattle Mariners Majestic Navy Alternate Cool Base Jersey

Newborn & Infant Seattle Mariners Majestic White Cool Base Romper Jersey
Sale: $19.99Regular: $34.99You Save: $15.00

Newborn & Infant Seattle Mariners Majestic White Cool Base Romper Jersey

Most Popular in Jerseys
Newborn & Infant Seattle Mariners Navy/Aqua/Gray Everyday Fan Three-Pack Bodysuit Set
$20.99 with codeRegular: $29.99You Save: $9.00

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

Most Popular in Kids
Infant Seattle Mariners New Era Navy My 1st 9TWENTY Adjustable Hat
$13.99 with codeRegular: $19.99You Save: $6.00

Infant Seattle Mariners New Era Navy My 1st 9TWENTY Adjustable Hat

Youth Seattle Mariners Navy Primary Logo Pullover Hoodie
$34.99 with codeRegular: $49.99You Save: $15.00

Youth Seattle Mariners Navy Primary Logo Pullover Hoodie

Youth Seattle Mariners Stitches Navy Logo Button-Down Jersey
$33.59 with codeRegular: $47.99You Save: $14.40

Youth Seattle Mariners Stitches Navy Logo Button-Down Jersey

Youth Seattle Mariners Majestic Navy Custom Roster Name & Number T-Shirt
Almost Gone!
$19.59 with codeRegular: $27.99You Save: $8.40

Youth Seattle Mariners Majestic Navy Custom Roster Name & Number T-Shirt

Most Popular in Kids T-Shirts
Youth Seattle Mariners JH Design Navy/Gray Reversible Hooded Jacket
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$62.99 with codeRegular: $89.99You Save: $27.00

Youth Seattle Mariners JH Design Navy/Gray Reversible Hooded Jacket

Youth Seattle Mariners Navy Team Color Wordmark Full-Zip Hoodie
$31.49 with codeRegular: $44.99You Save: $13.50

Youth Seattle Mariners Navy Team Color Wordmark Full-Zip Hoodie

Newborn & Infant Seattle Mariners Royal/Tan Cooperstown Collection Groovy Game Two-Pack Bodysuit Set
$15.39 with codeRegular: $21.99You Save: $6.60

Newborn & Infant Seattle Mariners Royal/Tan Cooperstown Collection Groovy Game Two-Pack Bodysuit Set

Most Popular in Kids
Youth Seattle Mariners Ken Griffey Jr. Majestic Navy Cooperstown Name & Number T-Shirt
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Newborn & Infant Seattle Mariners WinCraft 2-Pack Bib Set
Sale: $14.39Regular: $23.99You Save: $9.60

Newborn & Infant Seattle Mariners WinCraft 2-Pack Bib Set

Youth Seattle Mariners ISlide Royal Cooperstown Logo Slide Sandals
$31.49 with codeRegular: $44.99You Save: $13.50

Youth Seattle Mariners ISlide Royal Cooperstown Logo Slide Sandals

Youth Seattle Mariners Big Logo Scuff Slippers
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Sale: $11.99Regular: $19.99You Save: $8.00

Youth Seattle Mariners Big Logo Scuff Slippers

Girls Youth Seattle Mariners New Era Navy Blossom 9TWENTY Adjustable Hat
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Toddler Seattle Mariners Navy Team Primary Logo T-Shirt
$11.19 with codeRegular: $15.99You Save: $4.80

Toddler Seattle Mariners Navy Team Primary Logo T-Shirt

Youth Seattle Mariners Under Armour Navy MK-1 Performance Shorts
$24.49 with codeRegular: $34.99You Save: $10.50

Youth Seattle Mariners Under Armour Navy MK-1 Performance Shorts

Youth Seattle Mariners New Era Navy Threads 9FIFTY Adjustable Hat
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$18.19 with codeRegular: $25.99You Save: $7.80

Youth Seattle Mariners New Era Navy Threads 9FIFTY Adjustable Hat

Youth Seattle Mariners New Era Navy On-Field Sport Cuffed Knit Hat
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$16.79 with codeRegular: $23.99You Save: $7.20

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

Youth Seattle Mariners Majestic White Home Cool Base Jersey
Sale: $39.99Regular: $54.99You Save: $15.00

Youth Seattle Mariners Majestic White Home Cool Base Jersey

Youth Seattle Mariners Majestic Cream Alternate Cool Base Jersey
Sale: $39.99Regular: $54.99You Save: $15.00

Youth Seattle Mariners Majestic Cream Alternate Cool Base Jersey

Youth Seattle Mariners New Era Navy The League 9Forty Adjustable Hat
$14.69 with codeRegular: $20.99You Save: $6.30

Youth Seattle Mariners New Era Navy The League 9Forty Adjustable Hat

Youth Seattle Mariners New Era Navy Team Truckered 9FORTY Snapback Hat
$13.99 with codeRegular: $19.99You Save: $6.00

Youth Seattle Mariners New Era Navy Team Truckered 9FORTY Snapback Hat

Youth Seattle Mariners Stitches Navy Property Of Team Hoodie
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Sale: $27.99Regular: $39.99You Save: $12.00

Youth Seattle Mariners Stitches Navy Property Of Team Hoodie

Infant Seattle Mariners Navy Primary Logo T-Shirt
$10.49 with codeRegular: $14.99You Save: $4.50

Infant Seattle Mariners Navy Primary Logo T-Shirt

Youth Seattle Mariners New Era Navy On-Field Sport Knit Hat
$16.79 with codeRegular: $23.99You Save: $7.20

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

Infant Seattle Mariners Navy Personalized Blanket
$27.99 with codeRegular: $39.99You Save: $12.00

Infant Seattle Mariners Navy Personalized Blanket

Youth Seattle Mariners Stitches Heathered Charcoal Quarter-Zip Pullover Jacket
$27.99 with codeRegular: $39.99You Save: $12.00on select sizes

Youth Seattle Mariners Stitches Heathered Charcoal Quarter-Zip Pullover Jacket

Seattle Mariners Youth Distressed Logo T-Shirt - Navy Blue
$13.29 with codeRegular: $18.99You Save: $5.70

Seattle Mariners Youth Distressed Logo T-Shirt - Navy Blue

Youth Seattle Mariners Ken Griffey Jr. Majestic Cream/Navy Game Tradition Name & Number V-Neck T-Shirt
$24.49 with codeRegular: $34.99You Save: $10.50

Youth Seattle Mariners Ken Griffey Jr. Majestic Cream/Navy Game Tradition Name & Number V-Neck T-Shirt

Most Popular in T-Shirts
Youth Seattle Mariners Navy Primary Team Logo T-Shirt
$13.99 with codeRegular: $19.99You Save: $6.00

Youth Seattle Mariners Navy Primary Team Logo T-Shirt

Toddler Seattle Mariners Tiny Turnip White Slugger T-Shirt
$26.59 with codeRegular: $37.99You Save: $11.40

Toddler Seattle Mariners Tiny Turnip White Slugger 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.