Baseball (MLB)
The historic cradle of grading. Topps dominates, and 1950s-1980s vintage remains the reference segment — with the cutting defects characteristic of the era.
Sports cards
Panini, Topps, Upper Deck: sports cards are where grading began. They are also the segment where rookies and autographed cards create the widest value gaps between adjacent grades.
In short
To pre-grade a sports card, apply the four standard criteria (centering, corners, edges, surface) to both faces. On 1950s-1980s vintage baseball and football, centering and cut quality are the main limiting factors; on modern Panini and Topps Chrome, it is surface micro-scratches and border chipping. SGC is particularly well regarded on vintage, PSA across the whole market.
What to check
Vintage
Vintage cutting
1950s-1980s cards were cut from sheets: heavy off-centering, irregular edges and diamond cuts are common.
Modern
Chrome surfaces
Topps Chrome, Panini Prizm and their refractors show micro-scratches at almost any light angle.
Autographed cards
The autograph is assessed separately from the card. A signature that smears or fades drags the whole thing down.
Patches and relics
Cards with thick inserts tend to warp, which penalises surface and sometimes corners.
Guides by sport
The three most active segments, each with its own constraints.
The other disciplines that get graded
Same criteria, different markets and publishers.
American football (NFL)
Panini holds the main licences. Quarterback rookies concentrate demand, with considerable value gaps between a 9 and a 10.
Ice hockey (NHL)
Upper Deck is the historic publisher. A solid North American market, with sought-after vintage and closely followed rookies.
Rugby, tennis, combat sports
Narrower but real markets, often carried by one iconic figure rather than a league. Confirm a resale market exists before committing grading fees.
Multi-sport sets and boxed releases
Cross-discipline sets and anniversary boxes. Scarcity is often explicit (serial numbering), which simplifies assessing the upside.