Jack Clark
MLB All-Star First Baseman and Outfielder · Baseball - MLB
San Francisco Giants / St. Louis Cardinals
Era
1980s-1990s Playing Era
Item Type
Official league baseball
Condition
Very Good condition, with minor toning to the ball and a clear, highly legible blue ink signature.
Rarity
Common signer; Jack Clark signed frequently during his playing career and in retirement settings.
Overall Assessment
A clean, affordable vintage baseball autograph from a memorable 1980s MLB star, highly suitable for a team or era-specific collection.
Authenticity Assessment
Likely authentic based on fluid natural strokes and characteristic letter formations consistent with period examples.
Signature Style
Full legible cursive name with distinct looping capitals and smooth horizontal flow.
Signature Characteristics
Smooth, fluid lines with consistent pen pressure, natural slant, and distinct loops on the capital J and C.
Ink & Medium
Blue ballpoint pen ink, showing typical minor fading and aging consistent with vintage sports memorabilia.
Item Description
A standard baseball featuring red stitching with the signature neatly placed on the sweet spot or side panel, housed in a clear plastic protective display cube.
Estimated Value
$30 - $75 depending on authentication certification and exact ball type.
Comparison to Known Examples
Matches standard exemplar signatures from his tenure with the Cardinals and Giants.
Authentication Tips
Examine the looping 'J' and tall 'C', checking for natural speed, correct letter proportions, and lack of hesitation or tremor.
Certification Recommendation
PSA/DNA or JSA (James Spence Authentication)
Red Flags
No significant red flags observed; ink and flow appear entirely natural.
Provenance Notes
Sourced from a secondary market antique or thrift setting; lacks formal paperwork, making third-party certification desirable.
Historical Context
Jack Clark was a formidable power hitter in the 1980s, famously hitting the pennant-winning home run for the St. Louis Cardinals in the 1985 NLCS.
Market Trends
Stable demand among 1980s baseball collectors and St. Louis Cardinals team collectors.
Investment Potential
Modest, stable investment typical of a popular star player from the 1980s rather than a generational superstar.
Similar Autographs
Other 1980s MLB sluggers such as Keith Hernandez, Dale Murphy, and Tim Raines.
Display & Preservation
Keep away from direct sunlight inside a UV-protected acrylic display cube to prevent fading of the blue ballpoint ink.
Interesting Facts
Known by the nickname 'Jack the Ripper', Clark was one of the most feared clutch hitters of his era.