Mason Cook

Singlehanded & Keelboat Ratings

DisciplineRating Rank RacesLast raced
Keelboat1.49unranked (fewer than 10 races or not active)42Fall 2024

Team Race Rating

Rating Rank vs fleet rating Record
2.26 (fleet 3.61) 25 of 231 +0.03 ± 0.16
about what the fleet rating predicts
as skipper 55–77 (42%)
SeasonRegattas Skipper W–LCrew W–L
Spring 2025323–19—
Fall 202429–13—
Spring 202428–17—
Fall 2023210–11—
Spring 202324–11—
Fall 202211–6—
1.251.51.7522.25Spring 2023Fall 2023Spring 2024Fall 2024Spring 2025MDISA SSA Team Race (2023-03-18): rating 1.31, fleet rating alone 1.31, offset -0.00; record 3-4 in this boatMDISA Team Race Qualifier (2023-04-01): rating 1.67, fleet rating alone 1.66, offset +0.01; record 1-7 in this boatMDISA Fall Team Race Champs (Qualifier) (2023-09-30): rating 2.06, fleet rating alone 2.06, offset -0.01; record 9-7 in this boatMASSA Team Race Championship (2023-10-14): rating 2.09, fleet rating alone 2.06, offset +0.03; record 1-4 in this boatMDISA Team Race Qualifier (2024-04-13): rating 2.19, fleet rating alone 2.17, offset +0.02; record 4-3 in this boatMASSA Team Championship and Baker Qualifier (2024-04-27): rating 2.21, fleet rating alone 2.18, offset +0.03; record 4-14 in this boatMDISA Team Race Qualifier (2024-09-28): rating 2.19, fleet rating alone 2.17, offset +0.02; record 5-3 in this boatMASSA Team Race Championship (2024-10-12): rating 2.19, fleet rating alone 2.16, offset +0.02; record 4-10 in this boatMDISA Severn Team Race (2025-04-06): rating 2.21, fleet rating alone 2.20, offset +0.01; record 1-2 in this boatMDISA Severn Team Race (2025-04-06): rating 2.21, fleet rating alone 2.20, offset +0.01; record 2-1 in this boatMDISA Severn Team Race (2025-04-06): rating 2.21, fleet rating alone 2.20, offset +0.01; record 3-0 in this boatMDISA Baker Pre-Qualifier (2025-04-12): rating 2.22, fleet rating alone 2.21, offset +0.01; record 10-5 in this boatMASSA Baker Qualifier (2025-04-26): rating 2.26, fleet rating alone 2.24, offset +0.02; record 7-11 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 12 graded regattas (132 matches) the record is 55–77 against 54.3 wins the pre-event forecasts expected (+0.7). 1 regatta clearly above the rating (P ≤ 20%), 4 clearly below (P ≥ 80%); 6 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2025-04-26MASSA Baker Qualifierskipper2.712.607–117.2−0.110.067%
2025-04-12MDISA Baker Pre-Qualifierskipper2.663.5110–58.7+0.850.630%
2025-04-06MDISA Severn Team Raceskipper2.552.436–36.1−0.120.073%
2024-10-12MASSA Team Race Championshipskipper2.611.954–105.1−0.660.486%
2024-09-28MDISA Team Race Qualifierskipper2.592.985–34.7+0.390.159%
2024-04-27MASSA Team Championship and Baker Qualifierskipper2.591.654–145.9−0.941.093%
2024-04-13MDISA Team Race Qualifierskipper2.503.714–32.8+1.210.826%
2023-10-14MASSA Team Race Championshipskipper2.401.611–41.6−0.790.285%
2023-09-30MDISA Fall Team Race Champs (Qualifier)skipper2.263.379–76.3+1.111.710%
2023-04-01MDISA Team Race Qualifierskipper1.870.221–72.2−1.651.096%
2023-03-18MDISA SSA Team Raceskipper1.481.823–42.6+0.340.154%
2022-10-082022 MDISA TR Qualifierskipper1.281.021–61.1−0.260.077%

Regatta results

Regatta Role Div Races Avg Rating
Spring 2025 Team page Season
MDISA Severn Team Race Skipper TR 9 67% —
MDISA SCC Tier 1 Fleet Race Skipper A 6 2.3 3.65
MDISA Fleet Race Qualifier Skipper A 15 3.7 2.95
MDISA Baker Pre-Qualifier Skipper TR 15 67% —
MASSA Fleet Championship and Mallory Qualifier Skipper A 10 9.6 1.67
MASSA Baker Qualifier Skipper TR 18 39% —
Fall 2024 Team page Season
MDISA Tier 1 Fleet Race at SCC Skipper A 3 2.7 3.61
MDISA Team Race Qualifier Skipper TR 5 80% —
MDISA SCC Tier 1 Fleet Race Skipper A 6 2.7 3.19
MDISA Keelboat Qualifier Keelboat Skipper A 6 1.3 3.68
MASSA Team Race Championship Skipper TR 14 29% —
MASSA Fall Fleet Championship Skipper A 15 6.5 2.59
Spring 2024 Team page Season
MDISA TAYC Varsity Regatta Skipper A 4 2.8 1.39
MDISA Severn School Varsity Fleet Race Skipper A 6 3.0 2.43
MDISA Team Race Qualifier Skipper TR 7 57% —
MDISA Spring 2024 Varsity Championship Skipper A 6 2.5 3.14
MDISA Fleet Race Qualifier Skipper A 10 3.0 2.87
MASSA Team Championship and Baker Qualifier Skipper TR 18 22% —
MASSA 2024 Fleet Championship & Mallory Qualifier Skipper A 14 8.7 1.11
Fall 2023 Team page Season
MDISA Fall Team Race Champs (Qualifier) Skipper TR 14 50% —
MDISA Keelboat Qualifier @ Annapolis Yacht Club Keelboat Skipper A 5 2.8 2.46
MDISA Fleet Race (North) Skipper A 6 4.8 2.13
MDISA Fleet Qualifier - Fall '23 Skipper A 7 3.4 2.79
MASSA Team Race Championship Skipper TR 5 20% —
MASSA Fall Keelboat Championship 2023 Keelboat Skipper A 7 3.1 1.97
MASSA Fall Gold Championships Skipper A 7 4.1 2.64
High School National Keelboat Invitational Keelboat Skipper A 10 6.6 0.87
Spring 2023 Team page Season
MDISA Team Race Qualifier Skipper TR 8 12% —
MDISA SSA Team Race Skipper TR 7 43% —
MDISA Fleet Race Qualifier Skipper A 8 7.0 1.31
MASSA Silver Fleet Championship spring 2023 Skipper A 7 3.6 2.32
MDISA AYC Spring Fling - MDISA Fleet Race Skipper A 8 3.9 2.57
Fall 2022 Team page Season
MDISA SSA Fleet Race Skipper A 8 9.9 0.41
MDISA Keelboat Qualifier @ Annapolis Yacht Club Keelboat Skipper A 6 3.3 1.35
MDISA Fleet Race Qualifier Skipper A 12 8.4 0.69
MDISA Fall '22 DC Sail T1 Skipper A 5 4.2 0.66
2022 MDISA TR Qualifier Skipper TR 7 14% —
Spring 2022 Team page Season
MDISA SSA Fleet Race Skipper A 1 9.0 —
MDISA SCC Varsity Skipper B 6 6.3 1.24
MDISA Maryland Championship Skipper A 15 3.5 1.42
Fall 2021 Team page Season
MDISA Season Opener Gold Skipper B 5 2.2 3.11
MDISA Keelboat Qualifier @ Annapolis Yacht Club Keelboat Skipper A 5 2.4 1.70
MDISA Fleet Qualifier @SSA Skipper B 9 5.8 -0.01
MASSA Fleet Racing Silver Championships Skipper B 9 5.3 0.68
MASSA Fall Keelboat Championship 2021 Keelboat Skipper A 8 4.1 1.29
Spring 2021 Team page Season
MDISA Gunston Fall '21 Bronze Skipper A 4 4.5 0.28

Linked Profiles

League Name School Year
ICSA Mason Cook St. Mary's College of MarylandSt. Mary's College of Maryland '29

From the notes

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

All notes →

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