Grace Mahoney

Crew Rating

Career: 70.69 percentile of ICSA crews
0.500.751.001.25N. Synnott (6 races): -0.17N. SynnottM. Accettella (3 races): +0.05M. AccettellaSpring 2025: rating 0.88Spring 2025Hingham High SchoolN. Synnott (13 races): +0.31N. SynnottFall 2025: rating 0.65Fall 2025Hingham High SchoolN. Synnott (4 races): +0.18N. SynnottC. Teahan (16 races): +0.15C. TeahanJ. Scipione (3 races): +0.08Spring 2026: rating 0.95Spring 2026Hingham High School
▲ boats did better with this crew than with the skipper's usual crews▼ worseArrow length = size of the push, in rating points
Season Team Rating Range League
percentile
Team
percentile
On team Races Team page
Spring 2026 Hingham High School 0.95 Rating 0.95; 90% range -1.8 to 3.7; team skipper average 0.94 64.43 50.00 2 of 3 23 Team page
Fall 2025 Hingham High School 0.65 Rating 0.65; 90% range -2.2 to 3.5; team skipper average 0.18 62.04 87.50 1 of 4 13 Team page
Spring 2025 Hingham High School 0.88 Rating 0.88; 90% range -2.2 to 3.9; team skipper average 0.48 58.02 75.00 2 of 6 9 Team page

Team Race Rating

Rating Rank vs fleet rating Record
-0.54 (fleet -0.87) unranked (fewer than 30 matches as skipper, or not active) +0.00
about what the fleet rating predicts
as crew 10–12 (45%)
SeasonRegattas Skipper W–LCrew W–L
Spring 20261—1–2
Spring 20252—9–10

Team race surprisal: regatta by regatta

Over 3 graded regattas (22 matches) the record is 10–12 against 8.1 wins the pre-event forecasts expected (+1.9). 1 regatta clearly above the rating (P ≤ 20%), 1 clearly below (P ≥ 80%); 3 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2026-04-12Linda Juliano Girls TR Tourney '26crew0.31-1.171–21.7−1.480.694%
2025-05-17MBL TR Tournamentcrew1.181.345–54.7+0.160.055%
2025-05-03NESSA Team Racing Tournament (Terk Trophy)crew0.462.174–51.7+1.712.37%

Regatta results

Regatta Role Div Races Avg Rating
Spring 2026 Team page Season
NESSA Girls Championship (Herreshoff Trophy GREEN) Crew B 6 4.8 -0.01
NESSA Girls Championship (Herreshoff Trophy GOLD) Crew B 8 7.1 -0.05
MBL Freshman-Sophomore Fleet Race Crew B 2 2.0 +0.21
Linda Juliano Girls TR Tourney '26 Crew TR 7 71% —
Donald Green Regatta 26 Crew B 3 8.0 +0.08
Carl Zimba MBL Champs - Mercury Gold Crew A 4 3.5 +0.18
Fall 2025 Team page Season
Roy Williams Invitational Skipper A 4 18.0 —
Fall FunFest Crew A 2 13.5 -0.12
Duxbury Bay Maritime School Invitational Crew A 5 10.4 +0.19
2025 Arnold Brown Regatta Crew A 6 7.0 +0.25
Spring 2025 Team page Season
NESSA Team Racing Tournament (Terk Trophy) Crew TR 9 44% —
NESSA Herreshoff Qualifier - Hingham Crew A 3 6.0 +0.05
Merc Gold - 2025 Zimba MBL Championship Crew A 6 4.7 -0.17
MBL TR Tournament Crew TR 10 50% —

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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