John Mayfield

Rating History

Crew Rating

Crew effect over their career (not scaled to a team): 39.45 league percentile among crews with 30+ races (uncertainty ±0.098 rating points, on a spread of about 0.04 between crews; 87 races with rated skippers).

Season Team Rating Range League
percentile
Team
percentile
On team Races Team page
Spring 2026 University of California at Berkeley -0.09 Rating -0.09; 90% range -3.0 to 2.8; team skipper average 0.44 25.59 50.00 6 of 11 10 Team page
Spring 2025 University of California at Berkeley 0.35 Rating 0.35; 90% range -2.5 to 3.2; team skipper average 0.75 28.36 50.00 8 of 15 14 Team page
Fall 2024 University of California at Berkeley 0.43 Rating 0.43; 90% range -2.4 to 3.3; team skipper average 0.62 29.88 50.00 7 of 13 16 Team page

How much better or worse boats do with this sailor crewing than their skipper's rating predicts. The rating is on the skipper scale: the team's skipper average plus the crew's difference from their teammates, multiplied by 18.7 so a team's crews spread out like its skippers. Crews on one team differ far less than skippers do, so the band is about as wide as the spread itself: use the rating to line crews up across teams, not as a ranking within a team. In the Range column the dot is the rating, the shaded band is where it plausibly sits (90% range) and the dashed line is the team's skipper average; a wide band means little evidence. League percentile ranks the rating among all rostered crews in that league and season; team percentile ranks it among the crews on the same team that season (the share of teammates it beats, counting ties as half). Both use the skipper-scale rating, so the league one also reflects how strong the team's skippers are.

Regatta Role Div Races Avg
Spring 2026
PCCSC South Designate 2026 Crew A, B 4 12.5
Anteater JV Crew A 8 10.8
Fall 2025
UCSD Open Skipper B 9 16.2
Stoney Burke JV Crew A 3 4.0
PCCSC Richard Sweet Match Race Championship Sailor A 1 6.0
Kiara Broudy Memorial Regatta Skipper A 8 12.8
Fall Pacific Coast Championship Crew C 2 15.0
Spring 2025
PCCSC South Designate 2025 Crew B 6 10.3
PCCSC Carter Ford Open Team Race Championship Crew TR 9 22%
Mustang Team Race Crew TR 7 43%
Mustang Open JV Skipper A 8 14.2
Anteater Open Crew B 8 3.9
Fall 2024
UCSD Frosh Soph Crew A 2 11.5
Top-9 Fall Invite Crew A 2 15.5
Stoney Burke Crew B 6 7.7
Rose Bowl Regatta 2025 - COLLEGE Crew A 6 13.3
Kiara Broudy Memorial Skipper A 9 12.4
Fall PCC JV Skipper B 4 10.5

Related Sailors

League Name School Year
ISSA John Mayfield Laguna Blanca SchoolLaguna Blanca School '25