Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
2025 1972
2001 Rhode Island Open
- 25 Mar 2001
- 25 Mar 2001
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2025 to 1972 at the 2001 Rhode Island Open held on - 25 Mar 2001. The links below take you to pages that describe various aspects of the rating processor.
Introduction
Initial Rating
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.