The OpenCaddie Journal
RoughNotes
A weekly read on whatever's interesting in golf, seen through Mully, my data-grounded AI coach. The news, the gear, the debates, the data, with every number traced to a named source.
The 2026 rules changes were written for guys who have a referee
Five of the six new 2026 rules only work if a referee or a TV truck is present. The one that reaches your Saturday game gives you less relief, not more.
More stories
An AI coach should have to prove it's working
Where Mully's golf knowledge comes from, what it's forbidden to say, and how every prescribed drill gets tracked to a measured outcome. The whole method, published.
Beating balls at the range is making you worse
The way most of us beat a range bucket looks productive and vanishes by Saturday. What the research says, where it's shaky, and what I do instead.
Why your golf sim says you carry it farther than you do
Indoor carry numbers get quoted like gospel, then come up short on the course. What your launch monitor measures, what it estimates, and how to read yours.
The golf ball rollback won't touch your game. Here's what will.
The USGA just hit pause on the rollback again. Here is the full story, why it exists, who it actually affects, and what the distance data says is really costing you.
RoughNotes
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