Seattle Mariners October Baseball MLB Postseason 2025 T-shirt
Get ready to rep the Pacific Northwest loud and proud – the Seattle Mariners October Baseball MLB Postseason 2025 T-Shirt is finally here. Built for the diehards who have been waiting for this exact moment, this tee isn’t just merch, it’s history in the making. Whether you’ve been riding with the M’s since the Kingdome days or just hopped on during this electric playoff run, this shirt screams “we’re built for October.”
Crafted from soft, breathable cotton for all-day comfort, it’s perfect for rocking at T-Mobile Park, watching from the bar, or flexing on Twitter timelines when the Mariners stack up the Ws. The bold postseason design locks in that playoff energy — crisp team colors, postseason graphics, and the kind of vibe that lets everyone know Seattle baseball is alive and dangerous in 2025.
This is more than a shirt; it’s a collector’s piece. Every swing, every strikeout, every walk-off moment of October baseball lives in this fabric. Mariners fans have been waiting for this shot, and now it’s time to wear it with pride. Don’t just cheer the postseason — wear the postseason.
Perfect for fans, collectors, and anyone who loves being part of a moment bigger than the game. Once October ends, this design is gone — just like the other viral tees that blew up online. Limited run. Maximum hype.
More details
- Solid colors are 100% ring-spun cotton
- Sport Grey is 90% ring-spun cotton, 10% polyester
- Dark Heather is 65% polyester, 35% cotton
- Lightweight fabric: 4.5 oz/yd² (153 g/m²)
EU GPSR Product Information:
- Manufacturer contact information
- Name: TinyTools
- Email: contact@support.tinytols.shop
- Postal address: PO Box 5696 Santa Monica, CA 90405
- Additional information: This product is made for adults. Meets the flammability, lead, cadmium, bisphenols and phthalates level requirements. 2 year warranty in EEA and UK, established by Directive 1999/44/EC.
Size & Fit
Quality Guarantee & Returns
- Quality is guaranteed. If there is a print error or visible quality issue, we'll replace or refund it.
- Because the products are made to order, we do not accept general returns or sizing-related returns.
Seattle Mariners October Baseball MLB Postseason 2025 T-shirt Size Guide
| Size label | Length | Width | Sleeve length |
|---|---|---|---|
|
S
|
28
|
18
|
16.75
|
|
M
|
29
|
20
|
17.88
|
|
L
|
30
|
22
|
19.13
|
|
XL
|
31
|
24
|
20.38
|
|
2XL
|
32
|
26
|
21.63
|
|
3XL
|
33
|
28
|
22.75
|