This player is no longer an active prospect. They have either graduated to the majors or moved out of the prospect pipeline. Their Bowman cards are still tracked.
Guillermo Williamson Bowman Card Prices & Value
Track Bowman 1st Chrome autograph and rookie card values for this SF OF: raw and PSA 10 graded price trends, recent sales, and market data.
Guillermo Williamson: Common Questions
Does Guillermo Williamson have a 1st Bowman autograph, and which set is it in?
Yes. Guillermo Williamson's first Bowman autograph is in 2024 Bowman Chrome, card CPA-GWI. Until an MLB debut, that 1st auto is the closest thing to a Guillermo Williamson rookie card.
What are Guillermo Williamson's position, team, and age?
Guillermo Williamson is a OF in the SF organization.
How is Guillermo Williamson ranked among MLB prospects?
Guillermo Williamson is not currently inside our ranked prospect list.
How often does Guillermo Williamson's Bowman auto grade a PSA 10?
Across graded copies, Guillermo Williamson's base Bowman autograph hits a PSA 10 roughly 44% of the time (16 graded so far).
What is Guillermo Williamson's 1st Bowman auto worth, and where can I track the price?
Raw and PSA 10 sale prices, price history, and the HobbyMonitor value score for Guillermo Williamson update daily on this page for HobbyMonitor members.