This page explains how Sam Lawton (USATT# 92490)'s rating went from 1989 to 1965 at the Butterfly Spin &Smash June Open held on 3 Jun 2022 - 5 Jun 2022. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.