Donald B. Hayes
USATT#: 50664
| Coach Level: Club | Certified Umpire
1989 2067
34th St. Jospeh Valley Open/Al
- 10 May 1998
- 10 May 1998
This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 1989 to 2067 at the 34th St. Jospeh Valley Open/Al held on - 10 May 1998. 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.