Dick Costello
| Date | Course | Tee | Slope | Rating | Score | Equation | Differential |
|---|---|---|---|---|---|---|---|
| Oct. 1, 2025 | Virginia Beach National Golf Club | Gold | 115 | 65.9 | 85 | (85 - 65.9) x 113 ÷ 115 = | 18.8 |
| Aug. 27, 2025 | Stumpy Lake Golf Course | Green | 108 | 65.6 | 76 | (76 - 65.6) x 113 ÷ 108 = | 10.9 |
| Aug. 13, 2025 | Bide-A-Wee Golf Course | Yellow | 115 | 65.3 | 84 | (84 - 65.3) x 113 ÷ 115 = | 18.4 |
| July 16, 2025 | X - Eagle Haven Golf Course | White | 123 | 68.7 | 87 | (87 - 68.7) x 113 ÷ 123 = | 16.8 |
| July 9, 2025 | Bide-A-Wee Golf Course | Yellow | 115 | 65.3 | 83 | (83 - 65.3) x 113 ÷ 115 = | 17.4 |
| June 4, 2025 | Cypress Creek Golfers' Club | Gold | 119 | 66.3 | 76 | (76 - 66.3) x 113 ÷ 119 = | 9.2 |
| May 14, 2025 | Stumpy Lake Golf Course | Green | 108 | 65.6 | 80 | (80 - 65.6) x 113 ÷ 108 = | 15.1 |
| April 23, 2025 | Red Wing Lake Golf Course | Gold | 110 | 66.4 | 78 | (78 - 66.4) x 113 ÷ 110 = | 11.9 |
| Oct. 30, 2024 | Bide-A-Wee Golf Course | Yellow | 115 | 65.3 | 76 | (76 - 65.3) x 113 ÷ 115 = | 10.5 |
| Aug. 28, 2024 | Heron Ridge Golf Course | Gold | 123 | 66.9 | 82 | (82 - 66.9) x 113 ÷ 123 = | 13.9 |
| July 31, 2024 | Sewells Point Golf Course | Sewells Point Golf Course | 110 | 65.1 | 77 | (77 - 65.1) x 113 ÷ 110 = | 12.2 |
| May 15, 2024 | X - Eagle Haven Golf Course | White | 123 | 68.7 | 82 | (82 - 68.7) x 113 ÷ 123 = | 12.2 |
| April 17, 2024 | Red Wing Lake Golf Course | Gold | 110 | 66.4 | 81 | (81 - 66.4) x 113 ÷ 110 = | 15.0 |
| Sept. 6, 2023 | Bide-A-Wee Golf Course | Yellow | 115 | 65.3 | 76 | (76 - 65.3) x 113 ÷ 115 = | 10.5 |
Then we use the 4 lowest differentials according to this USGA table:
We add the lowest 4 differentials together, which are
9.2,
10.5,
10.5,
10.9,
and get 41.1.
Then we take that total and get the average differential score 41.1 ÷ 4 = 10.275
Lastly we lop off all numbers past the first decimal point and we get
Then we take that total and get the average differential score 41.1 ÷ 4 = 10.275
Lastly we lop off all numbers past the first decimal point and we get