Gunner Mayer
SP · Tacoma Rainiers · Triple-A · 26.0y · #5180 of 7,922 we rate
- The player
- LONG SHOT
- The market
- Untested
- What to do
- Watch
25 out of 100 — our all-round score from the season line, his tools against the level, and how young he is for it.
39 cards of his are listed and nothing comparable has verifiably sold, so we will not tell you whether the asks are fair.
Nobody has logged a completed sale for this card, so we can't say what it's worth.
Our take
Long-shot prospect, untested market.
Gunner Mayer scores 25 out of 100 (#5180 of the 7,922 we score), and the case rests on one thing: what the hobby pays up for — SP sells at a discount at equal production; 26.0 is old for a prospect card.
Nothing of his has verifiably sold in 90 days and there is no benchmark price, so we will not tell you what his cards are worth.
Cards of his are listed and none of them can be priced against a confirmed sale, so any judgment about value today would be a guess dressed as a number.
The thing most likely to be wrong here: no professional sample — we hold no season line for him, so every player-side reading on this page is missing its main input.
The signal
The case is fading
Baseball momentum 0/100 — the on-field case is fading. Read from his baseball alone — never from what his cards did.
What the hobby pays up for
SP sells at a discount at equal production; 26.0 is old for a prospect card.
Why now
No catalyst right now — no promotion, no logged step change, and no measurable move in his card prices. This is a valuation-driven watch rather than a timing one.
What could go wrong
No professional sample
We hold no season line for him, so every player-side reading on this page is missing its main input.
Nothing has sold
No confirmed sale of any card of his in 90 days, so nothing on this page can tell you what a fair price is.
Modeled value only
The fair values shown for his live cards are arithmetic from related evidence, not confirmed sales of the exact card.
Benchmark not checklist-verified
His core card was identified from how sellers describe it, not from a checklist. The identity is likely, not established.
What the hobby pays for him
Benchmark card: 2020 Bowman Chrome 1st Auto CPA-GMA — raw, base, unnumbered.
Described by 27 independent sellers — observed, not checklist-verified.
No price on this card yet
sales exist for this player, none on the benchmark card 27 copies are listed right now — asking prices are supply, never evidence of what it sells for.
This is his benchmark, not the value of any particular card in front of you — a /250 is a different market.
The card that matters
A card-quality answer, not a price one. It does not change when a seller changes their mind.
2020 Bowman Chrome 1st Auto CPA-GMA
Raw base 1st Bowman Chrome Auto
The canonical prospect vehicle — every player who has one is compared on it. Identified from 27 independent sellers describing it — likely, not established.
A card is never the one to own because it is numbered. Scarcity is a modifier on a vehicle, not a vehicle — a /25 of a card nobody collects is a rarer version of nothing.
Best value right now
Where the money would go today, which is frequently a lesser card than the one above — or nowhere.
Insufficient market evidence
No live ask and no confirmed sale on any version of his cards, so there is nothing here to call good or bad value.
What would make this a buy
- On his best-priced card: past the window.
- A promotion, or a stretch that lifts the season line, would move the player side of this.
What is for sale right now
39 cards of his are listed · 0 of the 39 we can judge clear the investment bar. These are the 6 worth looking at, best first; the other 33 are under "The whole live market".
2020 Bowman Chrome Gunner Mayer 1st Bowman Green Refractor Auto 73/99 CPA-GMA NM
/99 · raw · listed 1487d
Past the window · 2 other things in the way
Data stale — Last confirmed live 56h ago — beyond the 48h bar. Needs a re-sight before the analysis is current.
$12.95
modeled ~$19.85
NEEDS EVIDENCE
2020 Gunner Mayer Bowman 1st Chrome Mojo Blue Refractor Auto /150 #CPA-GMA
/150 · raw · condition not stated · takes offers · listed 86d
Past the window · 2 other things in the way
Data stale — Last confirmed live 56h ago — beyond the 48h bar. Needs a re-sight before the analysis is current.
$9.25
no sold price
NEEDS EVIDENCE
2020 Bowman Chrome Gunner Mayer Auto HTA Choice 1/150 1st Prospect Phillies
/150 · raw · condition not stated · takes offers · listed 56d
Past the window · 2 other things in the way
Data stale — Last confirmed live 56h ago — beyond the 48h bar. Needs a re-sight before the analysis is current.
$17.00
modeled ~$2.18
NEEDS EVIDENCE
GUNNER MAYER 2020 BOWMAN CHROME 1ST PURPLE REFRACTOR RC AUTO 127/250 #CPA-GMA
/250 · raw · condition not stated · takes offers · listed 89d
Past the window · 2 other things in the way
Data stale — Last confirmed live 56h ago — beyond the 48h bar. Needs a re-sight before the analysis is current.
$15.49
modeled ~$8.00
NEEDS EVIDENCE
Gunner Mayer 2020 Bowman Chrome 1st Refractor Auto CPA-GMA Phillies /499
/499 · raw · condition not stated · listed 34d
Past the window · 2 other things in the way
Data stale — Last confirmed live 56h ago — beyond the 48h bar. Needs a re-sight before the analysis is current.
$5.99
modeled ~$10.50
NEEDS EVIDENCE
2020 Bowman Chrome 1st - Gunner Mayer #CPA-GMA Phillies - Refractor AUTO /499
/499 · raw · condition not stated · takes offers · listed 244d
Past the window · 2 other things in the way
Data stale — Last confirmed live 56h ago — beyond the 48h bar. Needs a re-sight before the analysis is current.
$6.30
modeled ~$10.50
NEEDS EVIDENCE
Your research
Private to you. What you are waiting for, and why — so next time you open this page you do not have to remember.
Your target
The price you are waiting for, and why. Private to you.
Your notes
Sign in to keep your research — private notes on what you are watching and why.
The evidence
Everything the reading above is built on. Open whichever part you want to check.
The parallel ladder6 versions of his cards in raw autos, each priced off its own confirmed sales
Every version of his cards we can see, base to 1/1. Each rung is priced off its own confirmed sales — a rung nothing has verifiably sold at shows no value rather than borrowing a neighbour's.
Showing Raw autos.
NO CLEAR SWEET SPOT
No rung of his has a confirmed sale behind it, so there is no price to compare any step against.
- BaseTHIN EVIDENCE
Listed at $2.82, but nothing confirmed has sold on this rung.
- Sold
- —
- Live
- $2.82 live
- Scarcity
- unnumbered
- Trades
- no sales
- Premium
- —
- Refractor /499THIN EVIDENCE
Listed at $5.99, but nothing confirmed has sold on this rung.
- Sold
- —
- Live
- $5.99 live
- Scarcity
- 499 made
- Trades
- no sales
- Premium
- +112%
Premium from asking prices, not sales - Purple Refractor /250THIN EVIDENCE
Listed at $11.56, but nothing confirmed has sold on this rung.
- Sold
- —
- Live
- $11.56 live
- Scarcity
- 250 made
- Trades
- no sales
- Premium
- +93%
Premium from asking prices, not sales - Blue Mojo Refractor /150THIN EVIDENCE
Listed at $9.25, but nothing confirmed has sold on this rung.
- Sold
- —
- Live
- $9.25 live
- Scarcity
- 150 made
- Trades
- no sales
- Premium
- -20%
Premium from asking prices, not sales - HTA Choice /150THIN EVIDENCE
Listed at $17.00, but nothing confirmed has sold on this rung.
- Sold
- —
- Live
- $17.00 live
- Scarcity
- 150 made
- Trades
- no sales
- Premium
- +84%
Premium from asking prices, not sales - Green Refractor /99THIN EVIDENCE
Listed at $12.95, but nothing confirmed has sold on this rung.
- Sold
- —
- Live
- $12.95 live
- Scarcity
- 99 made
- Trades
- no sales
- Premium
- -24%
Premium from asking prices, not sales
1 listing sits in a different grade class or auto status and is kept off this ladder — a slabbed sale is not evidence about a raw card.
What he is good atno percentiles against his level yet
What he is good at
On the 20–80 scale every scouting report uses: 50 is average, and every 10 points is one standard deviation. Measured against 728 hitters at Triple-A — measured against real players at the same level right now — not a scout's projection of what he becomes.
Contact
Can he hit it?
—
not measured for him yet
—
strikeout rate, inverted — lower means more bat-to-ball
Power
Can he hit it hard?
—
not measured for him yet
—
isolated power — slugging minus batting average, so hits that go for extra bases
Plate discipline
Does he pick his pitch?
—
not measured for him yet
—
walk rate — higher means he makes pitchers come to him
Speed
Can he run?
—
not measured for him yet
—
stolen bases per full season of plate appearances
Production
Is it showing up in the box score?
—
not measured for him yet
—
on-base plus slugging — the result, which carries the luck as well as the skill
Age for the level
Is he doing it young?
52
average · better than 59% at his level · context, not a skill
0.0y vs his level
years younger than the median player at his level — positive is young for the level
Will he get there?
Real chance 5.4 / 10
- already at Triple-A
- old for Triple-A
This is an ordering score, not a percentage. We hold no outcome data and have run no backtest, so “a 93% chance of reaching the majors” would be a number we made up and you then spent money on. Built on 86% of what it wants to know — missing production.
How he is playingno season line on file
We hold no season stat line for him. That happens when he has not played enough this year, or when the roster refresh has not reached his level.
What his cards have sold forno completed sales logged yet
Real completed sales only — nothing here is an estimate. These come from the scan: it asks eBay about listings it has already seen, and one that ends at a fixed price is recorded as a sale. That builds up over days. You can add one by hand below if you happen to know it, but you are not meant to be the price database.
No sales logged yet. We need at least two to draw a line, and about five spread over a month before the numbers mean much. Add sales you find using the button below.
The whole live market39 listed · 39 eBay-verified · 33 not shown above
- Listings
- 39
- Lowest live
- $2.82
- Median ask
- $7.87
- Cheapest 1st auto
- $2.82
- Cheapest numbered 1st auto
- $5.99
39 eBay-verified
Latest eBay verification: 13 hours ago.
The other 33 cards
- $10.192020 Bowman Chrome #CPA-GMA Gunner Mayer 1st Bowman RC Auto Refractor SP #/499NEEDS EVIDENCE
- $10.90GUNNER MAYER 2020 Bowman Chrome 1st Prospect #CPAGMA REFRACTOR AUTO /499NEEDS EVIDENCE
- $24.792020 Bowman Chrome Prospect Gunner Mayer #CPA-GMA PSA 10 GEM MT Auto v1iNEEDS EVIDENCE
- $2.822020 Bowman Chrome 1st RC Gunner Mayer Auto #CPA-GMA NRMT-MT *shoeboxcards*NEEDS EVIDENCE
- $2.85Gunner Mayer 2020 Bowman Chrome #CPA-GMA 1st Prospect AutoNEEDS EVIDENCE
- $3.982020 Bowman Chrome Baseball - 1st Prospect Auto CPA-GMA Phillies - GUNNER MAYERNEEDS EVIDENCE
- $3.982020 Bowman Chrome Gunner Mayer RC Auto 1st Bowman CPA-GMA Philadelphia PhilliesNEEDS EVIDENCE
- $4.00GUNNER MAYER AUTO 1st 2020 Bowman Chrome Prospect Autographs CPA-GMA PHILLIESNEEDS EVIDENCE
- $4.742020 BOWMAN CHROME 1ST PROSPECT AUTO GUNNER MAYER PHILLIESNEEDS EVIDENCE
- $4.992020 BOWMAN CHROME 1ST PROSPECT AUTO GUNNER MAYER PHILLIESNEEDS EVIDENCE
- $5.502020 Bowman Chrome Gunner Mayer RC Auto 1st Bowman CPA-GMA Philadelphia PhilliesNEEDS EVIDENCE
- $5.62Gunner Mayer 2020 Bowman Chrome 1st Bowman AUTO RC PhilliesNEEDS EVIDENCE
- $6.322020 Bowman Chrome Gunner Mayer 1st Prospect Rookie RC #CPA-GMA Auto | PhilliesNEEDS EVIDENCE
- $6.992020 Bowman Chrome 1st Gunner Mayer Prospect Auto Philadelphia Phillies CPA-GMANEEDS EVIDENCE
- $7.492020 Bowman Chrome Gunner Mayer Phillies 1st Prospect Auto CPA-GMANEEDS EVIDENCE
- $8.242020 Bowman Chrome GUNNER MAYER 1st RC AUTO PhilliesNEEDS EVIDENCE
- $9.002019 1st Bowman Chrome Gunner Mayer Auto Philadelphia PhilliesNEEDS EVIDENCE
- $9.99GUNNER MAYER 2020 Bowman Chrome #CPA-GMA 1st PROSPECT AUTO Philadelphia PhilliesNEEDS EVIDENCE
- $13.99GUNNER MAYER 2020 BOWMAN CHROME 1ST RC AUTO #CPA-GMANEEDS EVIDENCE
- $17.652020 Bowman Chrome 1st Gunner Mayer Phillies Prospect Auto Card #CPA-GMA 💎NEEDS EVIDENCE
- $17.77GUNNER MAYER ROOKIE AUTOGRAPH 1st BOWMAN CARD CHROME PHILADELPHIA PHILLIES AUTONEEDS EVIDENCE
- —Topps 2020 Bowman Chrome Gunner Mayer 1st Bowman Auto #CPA-GMANEEDS EVIDENCE
- —2020 Bowman Chrome Gunner Mayer 1st Bowman Auto Philadelphia PhilliesNEEDS EVIDENCE
- —2020 Bowman Chrome Gunner Mayer Prospect Auto 1st #CPA-GMA PhilliesNEEDS EVIDENCE
- —2020 Bowman Chrome Gunner Mayer AUTO 1st Bowman Autograph Philadelphia PhilliesNEEDS EVIDENCE
- —2020 Bowman Chrome 1st Bowman Auto Gunner MayerNEEDS EVIDENCE
- —2020 Bowman Chrome 1st- Gunner Mayer- RC Prospect On Card Auto-Philadelphia P-NEEDS EVIDENCE
- —2020 1st Bowman Chrome Gunner Mayer Auto Card # CPA GMANEEDS EVIDENCE
- —2020 Bowman Chrome GUNNER MAYER 1st Prospect ON CARD AUTO Autograph PhilliesNEEDS EVIDENCE
- —Topps 2020 Bowman Chrome 1st Bowman Gunner Mayer RC Auto CPA-GMA PhilliesNEEDS EVIDENCE
- —2020 Bowman Chrome 1st CPA-GMA Gunner Mayer Prospect Autograph Auto PhilliesNEEDS EVIDENCE
- $11.562020 Bowman Chrome Prospect Purple Refractor 250/250 Gunner Mayer Auto 16zoNEEDS EVIDENCE
- —GUNNER MAYER 2020 BOWMAN CHROME 1ST BOWMAN RC AUTO PHILADELPHIA PHILLIESPASS
What this page is missing3 things we do not hold for him
What this page is missing
Everything above is built from what we actually hold. These are the gaps, so you know which parts of the argument are thin rather than wondering why a panel is quiet.
- We do not have a season stat line — he may not have played enough yet.
- We do not have percentiles against his level — the roster refresh computes these.
- We do not have a sold price in 90 days — add one and the whole price side fills in.
Worth reading for this player
- Parallel scarcity calculator — numbered parallels of his cards are in play, and print run drives the premium
- Best Offer calculator — at least one of his live listings accepts offers
- Certified vs aftermarket autographs — signed cards of his are listed, and the two kinds are not worth the same
- Parallels and print runs — his market includes numbered parallels, which are priced off the print run