This page explains how Roscoe Lock (USATT# 21921)'s rating went from 1801 to 1825 at the 2015 Seattle Open held on - 23 Aug 2015. 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.