This page explains how Roscoe Lock (USATT# 21921)'s rating went from 986 to 961 at the MTTC 2000 Open held on - 12 Aug 2000. 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.