William Roberts

Rating History

Crew Rating

Career: 57.52 percentile of ICSA crews (limited evidence)

No season rating yet: needs 8+ crewed races in a season.

Team Race Rating

Rating Rank vs fleet rating Record
0.78 (fleet 1.03) 317 of 328 +0.03 ± 0.18
about what the fleet rating predicts
as skipper 14–22 (39%)
as crew 0–6 (0%)
SeasonRegattas Skipper W–LCrew W–L
Spring 202613–12—
Spring 202510–5—
Spring 202424–40–6
Spring 202327–1—
0.40.50.60.70.8Spring 2023Spring 2024Spring 2025Spring 2026Washington College Team Race (2023-03-18): rating 0.49, fleet rating alone 0.51, offset -0.02; record 6-0 in this boatTom Noble Open Team Race (2024-03-02): rating 0.69, fleet rating alone 0.70, offset -0.01; record 4-4 in this boatWashington College Team Race (2025-03-15): rating 0.69, fleet rating alone 0.69, offset +0.00; record 0-5 in this boatNA Open Team Race at SMC (2026-02-28): rating 0.62, fleet rating alone 0.63, offset -0.01; record 3-12 in this boatTeam race rating

Rating before each regatta driven (solid; dots green when the boat won 60% or more of its matches there, red under 40%) and what the fleet rating alone would give (dashed). The gap is the team race offset as it stood at the time. Hover a dot for the regatta; click to open it.

Team race surprisal: regatta by regatta

Over 5 graded regattas (40 matches) the record is 13–27 against 12.9 wins the pre-event forecasts expected (+0.1). 1 regatta clearly above the rating (P ≤ 20%), 3 clearly below (P ≥ 80%); 8 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2026-02-28NA Open Team Race at SMCskipper0.812.363–120.8+1.552.84%
2025-03-15Washington College Team Raceskipper0.84-2.160–50.5≤−3.000.7>99%
2024-03-16Washington College Open Team Racecrew1.23-1.770–62.0≤−3.004.2>99%
2024-03-02Tom Noble Open Team Raceskipper0.831.034–43.7+0.200.057%
2023-03-18Washington College Team Raceskipper0.583.586–05.9≥+3.000.287%

Regatta results

Regatta Role Div Races Avg Rating
Spring 2026 Team page Season
NA Open Team Race at SMC Skipper TR 15 20% —
Hanbury Trophy Skipper A 14 5.3 1.18
Drexel Open Skipper B 1 2.0 —
Boston Dinghy Challenge Cup-2026 Skipper C 10 12.8 0.63
2026 Southern Collegiate Offshore Regatta (J105) Keelboat Crew A 6 5.8 —
Fall 2025 Team page Season
Central Series 1 Skipper A 9 4.4 -0.76
Allstate Sugar Bowl Skipper B 6 16.5 —
Spring 2025 Team page Season
Washington College Team Race Skipper TR 5 0% —
The Grant Skipper A 12 9.1 0.97
George Morris Trophy Skipper B 3 7.7 1.49
Fall 2024 Team page Season
KP Open Invite Skipper A 14 14.2 —
Spring 2024 Team page Season
Washington College Open Team Race Crew TR 7 0% —
Tom Noble Open Team Race Skipper TR 9 44% —
Ocean County Spring Open Skipper B 5 4.0 2.36
Hanbury Trophy Skipper A 10 9.0 1.64
George E. Morris Trophy Skipper A 7 9.1 -0.70
Fall 2023 Team page Season
Washington College Fall Skipper B 11 7.8 0.94
McCurdy Memorial Skipper B 12 2.2 2.19
The John Quinn Skipper B 8 2.9 1.26
Spring 2023 Team page Season
Washington College Team Race Skipper TR 21 67% —
Tom Noble Team Race Skipper TR 15 47% —
Southern Collegiate Offshore Regatta - PHRF B Keelboat Crew A 6 2.2 —
Ocean County Spring Open Skipper B 5 5.6 0.75
George Morris Trophy Skipper A 10 15.1 -0.56
Delaware River Dinghy Regatta Skipper A 8 4.9 0.10
Fall 2022 Team page Season
Princeton Fall Open Crew A 7 1.7 —
Mccurdy Memorial Crew A 3 7.0 —

From the notes

Short write-ups of what the ratings and results show, with the numbers and how they were computed.

All notes →