2025 Topps Series 1 Adam Mazur #309
Adam Mazur · Topps · Base Card / Rookie (RC)
Player
Adam Mazur
Set
2025 Topps Series 1
Year
2025
Card #
309
Condition Grade
Estimated PSA 9 (Mint). The card appears to have good centering on the reverse; however, faint corner softening on the bottom left and typical paper edge burrs at the top are visible in the photo.
Category
Base Card / Rookie (RC)
Manufacturer
Topps
Demand Level
Low to Moderate. As a base rookie of a pitcher currently developing his profile, demand is mostly limited to team set collectors (Marlins) and set builders.
Valuation
Raw (Ungraded) Value
$0.50 - $2.00
Graded Value
PSA 8: $8-12, PSA 9: $15-20, PSA 10: $35-45. (Note: Grading costs currently exceed the market value for this specific player/card type).
Comparable Sales
Base rookie cards for non-top-10 prospects in new Topps Flagship sets typically sell for $0.99 to $1.99 during the first month of release, eventually settling under $0.50 as supply increases.
Description
This is a 2025 Topps Series 1 base card of Miami Marlins pitcher Adam Mazur. The card back features his 2023-2024 Minor and Major League pitching records with both the San Diego Padres and Miami Marlins organizations. It highlights his collegiate-style pitching profile and his MLB debut against the Angels.
Key Features
Rookie year card for a young pitching prospect. Features the updated 2025 design and lists his trade from the Padres to the Marlins. Part of the first flagship release of the 2025 calendar year.
Authenticity Indicators
High Confidence. The card features the official Topps and MLB Players logos, accurate 2025 copyright fine print, and a unique CMP code (CMP097547) consistent with base Series 1 cards.
Flaws to Note
A small white fleck (burr) on the top edge and slight rounding on the bottom left corner (rear view). Centering on the back is slightly shifted toward the bottom.
Selling Guide
Where to Sell
eBay (as part of a 'pick your card' listing), COMC (Check Out My Cards) for high-volume sales, or local card shop trade-in piles.
Selling Tips
Do not grade this card at current market prices as the cost of grading is higher than the card's value. List as part of a lot or a Marlins team set to maximize visibility. Use protective penny sleeves and top loaders immediately to prevent surface scratches.