Due to the Canada Postal strike - some addresses within the country will be temporarily unavailable for delivery and returns processing. All packages will be delivered and returns processed as soon as possible.
100% Official Merchandise
365 Day Returns
Free Shipping on orders Over $69. Use Code: 69CA. *Each offer has a limited duration that expires at the specified time. Some promotions may require that you enter a code. By making a purchase featuring a discount or promotion, including where a code may be required, you are agreeing to these terms and exclusions. Generally, eligibility will be as reflected in the price shown on the product page. However, discounts and promotions for certain products may only appear once an item is added to the cart and the code is entered. Prices and fees, including any applicable discount(s), will be as reflected in the cart. Only the as-discounted retail price (excluding applicable shipping, taxes, and handling fees) counts toward any minimum spend required for eligibility. If a rewards program applies, the rewards may only apply to the as-discounted retail price. Discounts and promotions do not apply to gift cards. Gift card purchases do not count toward any minimum spend required for eligibility. Exclusions may apply, including: all auctions and product drops; product that is already on sale, of limited quantity, for recent championship or other special events; select jerseys, on-field headwear, die cast and certain collectibles; and certain premium brand product. Additional terms and other exclusions may apply in our sole discretion.
1 - 72 of 131
T-Shirts
MLB
131 Items
Reduced: $34.99
Regular: $49.99
Seattle Mariners Nike Local Legend - T-Shirt - Navy
Reduced: $34.99
Regular: $49.99
Seattle Mariners Nike Authentic Collection Velocity Performance T-Shirt - Navy
Reduced: $34.99
Regular: $49.99
Seattle Mariners Nike Local Legend - T-Shirt - Heather Gray
Reduced: $31.99
Regular: $44.99
Seattle Mariners Nike Team Scoreboard T-Shirt - Navy
Reduced: $34.99
Regular: $49.99
Seattle Mariners Nike Authentic Collection Velocity Performance T-Shirt - Aqua
Reduced: $34.99
Regular: $49.99
Seattle Mariners Nike Authentic Collection City Connect Velocity Performance T-Shirt - Royal
Reduced: $47.99
Regular: $68.99
Seattle Mariners Fanatics Unisex Elements Super Soft Short Sleeve T-Shirt - Navy
Ships Free
$69.99
Seattle Mariners Pro Standard Neutral Drop Shoulder T-Shirt - Tan
Ships Free
Reduced: $87.99
Regular: $124.99
Seattle Mariners Fanatics Front Office Short Sleeve Button-Up Shirt - Olive
$58.99
Seattle Mariners Nike Arched T-Shirt - Heather Gray
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike Fuse Logo T-Shirt - Navy
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike My Town Legend T-Shirt - Navy
Reduced: $56.99
Regular: $75.99
Ichiro Suzuki Seattle Mariners Mitchell & Ness Cooperstown Collection Player T-Shirt - White
Reduced: $56.99
Regular: $75.99
Felix Hernandez Seattle Mariners Nike Hall of Fame Name & Number T-Shirt - Navy
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike Cooperstown Wordmark T-Shirt - Gold
Reduced: $29.99
Regular: $58.99
Seattle Mariners Fanatics Hard To Beat T-Shirt - Navy
Most Popular in T-Shirts
Reduced: $54.99
Regular: $109.99
Seattle Mariners Concepts Sport Meter T-Shirt & Pants Sleep Set - Charcoal/Navy
Most Popular in Pajamas & Underwear
Reduced: $47.99
Regular: $63.99
Ken Griffey Jr. Seattle Mariners Homage Illustration Tri-Blend T-Shirt - Navy
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Legend Fuse Large Logo Performance T-Shirt - Navy
Ships Free
Reduced: $94.99
Regular: $126.99
Seattle Mariners Nike City Connect Color Block Short Sleeve Pullover Hoodie - Royal
Reduced: $41.99
Regular: $84.99
Seattle Mariners Fanatics Push Short Sleeve Pullover Hoodie - Heather Navy
Ships Free
Reduced: $69.99
Regular: $92.99
Ken Griffey Jr. Seattle Mariners Mitchell & Ness Cooperstown Collection Highlight Sublimated Player Graphic T-Shirt
Ships Free
$84.99
Seattle Mariners New Era x Felt T-Shirt - Black
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike True to the Blue Hometown T-Shirt - Royal
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike Rally Rule T-Shirt - Navy
$50.99
Seattle Mariners Nike Jackie Robinson Day Team 42 T-Shirt - Navy
Most Popular in T-Shirts
$67.99
Seattle Mariners Fanatics 2022 Postseason Locker Room T-Shirt - Navy
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Rewind Retro Tri-Blend T-Shirt - Royal
$50.99
Kane Brown x Seattle Mariners Fanatics T-Shirt - Navy
Ships Free
$70.99
Seattle Mariners Nike 2022 Postseason T-Shirt - Heather Charcoal
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike Americana T-Shirt - Navy
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike City Connect Large Logo T-Shirt - Royal
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike City Connect T-Shirt - Royal
Most Popular in T-Shirts
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike 2-Hit Speed City Connect T-Shirt - Royal
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Home Spin Tri-Blend T-Shirt - Heather Navy
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Large Logo Back Stack T-Shirt - Navy
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike Scoreboard T-Shirt - Navy
$67.99
Seattle Mariners Nike City Connect Tri-Blend T-Shirt - Royal
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike City Connect Authentic Collection Practice Velocity Performance T-Shirt - Royal
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike City Connect 2-Hit T-Shirt - Royal
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Fuse Legend T-Shirt - Navy
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike Team Swoosh Lockup T-Shirt - Navy
$58.99
Seattle Mariners Fanatics Split Zone T-Shirt - Navy
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Large Logo Velocity T-Shirt - Navy
Reduced: $46.99
Regular: $67.99
Seattle Mariners Homage Hand-Drawn Logo Tri-Blend T-Shirt - Navy
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Cooperstown Collection Local Stack Tri-Blend T-Shirt - Heather Royal
Reduced: $46.99
Regular: $67.99
Seattle Mariners Homage Hyper Local Tri-Blend T-Shirt - Royal
Reduced: $46.99
Regular: $67.99
Julio Rodríguez Seattle Mariners Nike City Connect Fuse Name & Number T-Shirt - Royal
Reduced: $43.99
Regular: $58.99
Randy Arozarena Seattle Mariners Nike Fuse Name & Number T-Shirt - Navy
Reduced: $50.99
Regular: $67.99
Jorge Polanco Seattle Mariners Nike Fuse Name & Number T-Shirt - Navy
Reduced: $40.99
Regular: $58.99
Seattle Mariners Fanatics Home Team Tri-Blend T-Shirt - Heather Royal
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike Gum Hometown T-Shirt - Navy
Reduced: $35.99
Regular: $50.99
Seattle Mariners Fanatics Iconic Go for Two T-Shirt - Heathered Gray
$67.99
Seattle Mariners MLB x Guy Fieri’s Flavortown Unisex Tri-Blend T-Shirt - Teal
Reduced: $50.99
Regular: $67.99
Seattle Mariners '47 Hang Back Franklin T-Shirt - Navy
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike Local Rep Legend Performance T-Shirt - Heathered Charcoal
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Wordmark Outline Legend T-Shirt - Navy
Reduced: $46.99
Regular: $67.99
Seattle Mariners Fanatics Iconic Rebel Short Sleeve Hooded Top - Navy
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Knockout Legend Performance T-Shirt - Navy
Reduced: $43.99
Regular: $58.99
Seattle Mariners '47 Outlast Franklin T-Shirt - Royal
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Authentic Collection Velocity Performance Practice T-Shirt - Navy
Reduced: $44.99
Regular: $63.99
Seattle Mariners '47 HR Celebration T-Shirt - Navy
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Authentic Collection Early Work Tri-Blend Performance T-Shirt - Navy
Reduced: $40.99
Regular: $58.99
Seattle Mariners Darius Rucker Collection by Fanatics Beach Splatter T-Shirt - Black
Reduced: $46.99
Regular: $67.99
Seattle Mariners Darius Rucker Collection by Fanatics Henley T-Shirt - Heather Gray
Reduced: $40.99
Regular: $58.99
Seattle Mariners Nike Fashion Local T-Shirt - Black
Most Popular in T-Shirts
$67.99
Seattle Mariners Darius Rucker Collection by Fanatics Cooperstown Collection Washed T-Shirt - Royal
Reduced: $46.99
Regular: $67.99
Felix Hernandez Seattle Mariners Nike 2023 Hall of Fame T-Shirt - Navy
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Authentic Collection Velocity Performance Practice T-Shirt - Aqua
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Coffee Hometown Legend Performance T-Shirt - Navy
Almost Gone!
Reduced: $46.99
Regular: $67.99
Seattle Mariners Nike Home Plate Icon Legend Performance T-Shirt - Navy
Reduced: $47.99
Regular: $63.99
Seattle Mariners Darius Rucker Collection by Fanatics Henley Raglan T-Shirt - White
MLB