This page explains how John Mark Wetzler (USATT# 11058)'s rating went from 2172 to 2158 at the 2nd Westchester Over-40 Table Tennis Open held on 9 Sep 2017 - 10 Sep 2017. 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.