Owen Macwilliams

Rating History

Crew Rating

Career: 46.34 percentile of ICSA crews (limited evidence)

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

Singlehanded & Keelboat Ratings

DisciplineRating Rank RacesLast raced
Keelboat1.768 of 9912Fall 2026

Team Race Rating

Rating Rank vs fleet rating Record
3.07 (fleet 4.28) unranked (fewer than 30 matches as skipper, or not active) −0.02 ± 0.17
about what the fleet rating predicts
as skipper 15–12 (56%)
as crew 5–2 (71%)
SeasonRegattas Skipper W–LCrew W–L
Spring 202649–122–2
Spring 202526–03–0
2.82.93Spring 2026Aaron Szambecki Team Race (2026-03-21): rating 2.93, fleet rating alone 2.93, offset +0.00; record 2-3 in this boatThompson Trophy (2026-04-11): rating 2.86, fleet rating alone 2.89, offset -0.03; record 2-1 in this boatThompson Trophy (2026-04-11): rating 2.86, fleet rating alone 2.89, offset -0.03; record 4-8 in this boatICSA Open Team Race National Championship (2026-04-23): rating 2.87, fleet rating alone 2.90, offset -0.03; record 1-0 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 (33 matches) the record is 19–14 against 20.8 wins the pre-event forecasts expected (−1.8). 0 regattas clearly above the rating (P ≤ 20%), 3 clearly below (P ≥ 80%); 3 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2026-04-11Thompson Trophyskipper3.293.126–96.5−0.170.172%
2026-03-21Aaron Szambecki Team Raceskipper3.482.502–33.0−0.980.793%
2026-03-14Graham Hall Team Racecrew4.002.372–22.9−1.621.098%
2025-03-22Admiral Moore Team Raceskipper3.096.096–05.9≥+3.000.193%
2025-03-15Graham Hall Team Racecrew3.516.513–02.5≥+3.000.951%

Regatta results

Regatta Role Div Races Avg Rating
Fall 2026 Team page Season
Open Atlantic Coast Championship Skipper B 7 8.7 4.14
Open Atlantic Coast Championships Round 1B Skipper B 6 3.7 5.16
Danmark Trophy Skipper B 3 10.0 3.66
Chesapeake Invitational Skipper C 8 4.2 1.60
Spring 2026 Team page Season
Thompson Trophy Skipper TR 15 40% —
ICSA Open Team Race National Championship Skipper TR 22 50% —
Graham Hall Team Race Crew TR 20 60% —
Aaron Szambecki Team Race Skipper TR 13 62% —
Fall 2025 Team page Season
Riley Cup Skipper B 13 2.3 4.20
Open Atlantic Coast Championship Finals Crew A 4 7.5 +0.17
Danmark Trophy Skipper B 11 11.2 3.39
Chesapeake Open Skipper A 1 3.0 —
Spring 2025 Team page Season
Graham Hall Team Race Crew TR 15 93% —
Admiral Moore Team Race Skipper TR 14 93% —
Fall 2024 Team page Season
Riley Cup Skipper A 6 5.7 3.59
Nevins Trophy Skipper B 14 6.6 3.77
Chesapeake Open Skipper B 6 3.8 3.46

Linked Profiles

League Name School Year
ISSA Owen Macwilliams Archbishop SpaldingArchbishop Spalding '24

From the notes

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

All notes →