PlayerGem

A fictional shop writing about method. No picks, no lines to act on, and nothing here is betting or investment advice. What this is.

PlayerGem — Notes on finding the undervalued player. The method, not the picks.

PlayerGem

Notes on finding the undervalued player. The method, not the picks.

Latest Articles

Recent posts from across the site.

Corpus 6 min read

When the Feed Quietly Changed Shape

How a silent upstream format change corrupted months of PlayerGem's corpus before the calibration logs finally caught...

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Calibration 6 min read

What We Do With a Rating We Can No Longer Grade

PlayerGem's method for handling ratings that can't be graded after the fact — and why unresolvable records are the mo...

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Calibration 6 min read

When Instinct Outscored the Corpus

PlayerGem's grading desk on the week a colleague's unaided instinct produced better-calibrated ratings than the shop'...

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Calibration 6 min read

Shrinking Our Own Confidence on Principle

PlayerGem applied shrinkage to its own stated confidence levels and found the shop had been systematically overclaimi...

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Gates 6 min read

The Off-Season Problem Nobody Warns You About

PlayerGem's gates assume an active season. When the off-season arrives, the disqualification logic breaks in ways tha...

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Sports 6 min read

Rotation, Rest, and the Limits of Prior Performance

PlayerGem's cross-sport analysis of how rotation and rest patterns break prior-performance models differently in bask...

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