Jack Holbrook

Rating History

Crew Rating

Career: 55.81 percentile of ICSA crews

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

Singlehanded & Keelboat Ratings

DisciplineRating Rank RacesLast raced
Singlehanded1.70unranked (fewer than 10 races or not active)15Fall 2017

Team Race Rating

Rating Rank vs fleet rating Record
1.59 (fleet 2.20) unranked (fewer than 30 matches as skipper, or not active) −0.00 ± 0.18
about what the fleet rating predicts
as skipper 8–10 (44%)
as crew 20–27 (43%)
SeasonRegattas Skipper W–LCrew W–L
Spring 20202—16–17
Spring 20191—1–6
Spring 201828–103–4

Team race surprisal: regatta by regatta

Over 5 graded regattas (64 matches) the record is 28–36 against 34.6 wins the pre-event forecasts expected (−6.6). 0 regattas clearly above the rating (P ≤ 20%), 5 clearly below (P ≥ 80%); 5 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2020-02-15Nelson Roltsch Team Racecrew2.962.596–126.8−0.370.280%
2020-02-01Gaucho Team Racecrew2.731.9710–511.4−0.760.893%
2019-01-26Gaucho Team Racecrew0.49-0.161–61.5−0.650.288%
2018-02-10Cal Team Raceskipper1.550.178–910.9−1.382.899%
2018-01-27Gaucho Team Racecrew1.650.953–44.1−0.700.690%

Regatta results

Regatta Role Div Races Avg Rating
Spring 2020 Team page Season
Nelson Roltsch Team Race Crew TR 21 38% —
Gaucho Team Race Crew TR 15 67% —
Fall 2019 Team page Season
UCSD Open Skipper B 8 7.0 1.10
Stoney Burke JV Skipper A 11 4.2 2.44
Fall Pacific Coast Champs - JV Skipper B 9 3.9 2.79
Spring 2019 Team page Season
Port of Los Angeles Harbor Cup Keelboat Crew A 10 4.7 —
PCCSC Southern Area Designate Skipper B 6 9.8 1.57
Gaucho Team Race Crew TR 7 14% —
Fall 2018 Team page Season
Stoney Burke JV Crew B 12 1.8 —
Fall Pacific Coast Champs - JV Crew A 9 1.9 —
Spring 2018 Team page Season
Mustang Open Skipper B 6 10.7 0.53
Gaucho Team Race Crew TR 10 30% —
Cal Team Race Skipper TR 14 57% —
2018 St. Francis Invite Skipper B 9 11.9 0.56
Fall 2017 Team page Season
UCSD Frosh Soph Regatta Skipper A 10 6.8 2.28
PCCSC Men's Single-Handed Championship Singlehanded Skipper A 15 10.5 0.60
New Dock Party Regatta Skipper A 11 12.4 0.60
Fall Pacific Coast Champs - JV Skipper B 7 2.9 2.67
2017 Cardinal Invite Crew A 13 9.3 —

Linked Profiles

League Name School Year
ISSA Jack Holbrook Roosevelt High SchoolRoosevelt High School '17
ISSA Jack Holbrook Nathan Hale High SchoolNathan Hale High School '17

From the notes

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

All notes →