Defining Edges with Jonathan Jaffe: Adapt or die (or take up golf)

Jonathan Jaffe
Jonathan Jaffe
Jonathan Jaffe
Posted on: October 4, 2026 00:47 PDT

Jonathan Jaffe is a poker coach and high-stakes tournament professional with over $20 million in live earnings. He is a co-founder of GTO LAB, where he hosts the GTO LAB Podcast, and is available for coaching both cash game and tournament players. Contact him to find out more.

In this article, first published on his Substack, Jaffe looks back at a fork in the road of his career, and a stark choice he had to face. Stay tuned for more, including exclusive access to new articles.


To understand my demise in 2010, you need to understand the mechanics of the heads-up sit & go ecosystem.

For each stake ($100, $200, $500, $1K, $2K and $5K) there was one lobby1. Once two players sat in that lobby, the match would begin, and a new lobby would spawn immediately. If you wanted to play a match, you had to play the person who was sitting in the lobby, there was no getting around it. If the lobby happened to be empty, you could sit first, but then you would have to play against whomever sat second2.