This page explains how Gary D. Harbeck (USATT# 6425)'s rating went from 1887 to 1980 at the Florida Orange Blossom Series Winter Open 2018 held on 16 Feb 2018 - 17 Feb 2018. 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.