Mary Hayes Cobbum

Rating History

Team Race Rating

Rating Rank vs fleet rating Record
0.92 (fleet 1.45) 156 of 231 +0.02 ± 0.16
about what the fleet rating predicts
as skipper 34–56 (38%)
SeasonRegattas Skipper W–LCrew W–L
Spring 2026211–18—
Fall 202523–17—
Spring 2025316–18—
Spring 202414–3—
0.80.911.11.2Spring 2025Fall 2025Spring 2026Fall 2026MDISA SSA Team Race (2025-03-22): rating 0.88, fleet rating alone 0.85, offset +0.03; record 6-4 in this boatMDISA Severn Team Race (2025-04-06): rating 1.06, fleet rating alone 1.02, offset +0.04; record 0-3 in this boatMDISA Severn Team Race (2025-04-06): rating 1.06, fleet rating alone 1.02, offset +0.04; record 5-1 in this boatMDISA Baker Pre-Qualifier (2025-04-12): rating 1.07, fleet rating alone 1.03, offset +0.04; record 5-10 in this boatMDISA Team Race Qualifier (2025-10-05): rating 1.06, fleet rating alone 1.02, offset +0.04; record 1-5 in this boatMASSA Team Race Championship (2025-10-18): rating 1.05, fleet rating alone 1.02, offset +0.03; record 2-12 in this boatMDISA Team Race (2026-04-11): rating 0.97, fleet rating alone 0.95, offset +0.02; record 8-9 in this boatMASSA 2026 Team Race Championship/Baker Qualifier (2026-04-25): rating 0.97, fleet rating alone 0.94, offset +0.04; record 3-9 in this boatMDISA Team Race Qualifier (2026-10-03): rating 0.89, fleet rating alone 0.85, offset +0.04; record 5-5 in this boatMASSA 2026 Fall Team Race Championship (2026-10-17): rating 0.90, fleet rating alone 0.86, offset +0.04; record 0-18 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 8 graded regattas (90 matches) the record is 34–56 against 33.5 wins the pre-event forecasts expected (+0.5). 0 regattas clearly above the rating (P ≤ 20%), 2 clearly below (P ≥ 80%); 3 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2026-04-25MASSA 2026 Team Race Championship/Baker Qualifierskipper1.260.453–94.1−0.810.589%
2026-04-11MDISA Team Raceskipper1.232.008–96.4+0.770.725%
2025-10-18MASSA Team Race Championshipskipper1.261.052–122.2−0.200.073%
2025-10-05MDISA Team Race Qualifierskipper1.30-0.481–51.8−1.780.897%
2025-04-12MDISA Baker Pre-Qualifierskipper1.491.115–105.7−0.380.178%
2025-04-06MDISA Severn Team Raceskipper1.441.295–45.1−0.150.074%
2025-03-22MDISA SSA Team Raceskipper1.231.646–45.4+0.410.148%
2024-04-13MDISA Team Race Qualifierskipper0.691.904–32.8+1.210.826%

Regatta results

Regatta Role Div Races Avg Rating
Spring 2026 Team page Season
MDISA Team Race Skipper TR 17 47% —
MDISA 's T1 - AYC's "Polar Bear Plunge" Regatta Skipper B 6 6.7 1.39
MDISA Fleet Qualifier Spring 2026 Skipper A 9 8.0 1.26
MASSA 2026 Team Race Championship/Baker Qualifier Skipper TR 12 25% —
MASSA 2026 Fleet Championship & Mallory Qualifier Skipper B 8 12.9 0.90
Girls Catholic Schools Regatta Skipper A 13 4.9 1.66
Fall 2025 Team page Season
MDISA Team Race Qualifier Skipper TR 6 17% —
MDISA SSA Fleet Race Skipper B 3 6.7 1.04
MDISA Fleet Qualifier Skipper B 7 5.9 1.49
MDISA's T1 - AYC's "Fall Home Coming" Fleet Race Skipper B 5 3.0 3.00
MASSA Team Race Championship Skipper TR 14 14% —
MASSA 2025 Fall Invitational Skipper A 8 6.9 1.17
Spring 2025 Team page Season
MDISA Severn Team Race Skipper TR 9 56% —
MDISA SSA Team Race Skipper TR 9 56% —
MDISA SSA Girls Regatta Skipper A 3 2.3 —
MDISA SCC Tier 1 Fleet Race Skipper B 4 2.5 3.03
MDISA Fleet Race Qualifier Skipper B 11 4.9 1.93
MDISA DC Sail T1 Fleet Race Skipper B 4 4.8 1.62
MDISA Baker Pre-Qualifier Skipper TR 15 33% —
MASSA Fleet Championship and Mallory Qualifier Skipper A 6 12.8 0.54
Fall 2024 Team page Season
MDISA Tier 1 Fleet Race at SCC Skipper A 1 13.0 —
MDISA SCC Tier 1 Fleet Race Skipper A 2 5.0 0.55
MASSA Girls Fall Invitational Skipper B 10 5.8 1.62

Linked Profiles

League Name School Year
ISSA Mary Hayes Cobbum Key SchoolKey School '27
ISSA Mary Hayes Cobbum Annapolis High SchoolAnnapolis High School '27

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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