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Sailor · 2013–2026

Chapman Petersen

lake geneva yacht club C ScowILCA 6 (Laser Radial)X Boat

Search sailors · About these ratings

Events
107

752 races · 299 race wins

Win rate
35%

35% win rate · 37 of 107

Podium rate
54%

58 top-three finishes

Typically beats
84%

of boats faced (range 83%–85%, 4,103 boats)

Best class ranking
#30

Helm in ILCA 6 (Laser Radial) · rating 724

Longest win streak
22

race wins in a row

Most successful partnership
Abby Baird

3 wins · 3 podiums in 3 events together

Best trio
Michelle Lahrkamp & Gwendolyn Donahue

2 wins · 3 podiums in 3 events, all three aboard

Biggest lift
Abby Baird

+21 points of fleet beaten when sailing together

Longest-running crew
James Petersen

Jul 2016 – Apr 2023 · 24 events

Nemesis
Michael Beckett

2–24 head to head in 26 races

Rival
Daniel Escudero

59–59 in 119 races

Best day
26 Oct 2024

3-1-1-1-2-1-1-2-3-1-1-2-1-1-1-1-1-1-2-1-2-2-3-1-1-1-1-1-1-1-1-1 · Top-9 Fall Invite

Signature result
1st of 77

2019 Dinghy Fest · X Boat · 7 Jul 2019

Partnerships · 53 sailors

Most successful partnership: Abby Baird — 3 wins · 3 podiums in 3 events together
  • James Petersen · All In, ALL IN, Galloping Ghost, Razr · A Scow, C Scow, MC Scow, Melges 14 24events 4 wins together · 8 podiums · 17% win rate · 36 of 95 races won Beat 54% of the fleet together(−33 vs. without) · best 1st · Jul 2016 – Apr 2023
  • Gwendolyn Donahue · Stanford University (Cardinal 2), Stanford University (Cardinal) · College fleet racing, College team racing 6events 2 wins together · 5 podiums · 33% win rate · 76 of 111 races won Beat 86% of the fleet together(+7 vs. without) · best 1st · Feb 2023 – May 2023
  • Justin Lim · Stanford University (Cardinal 2), Stanford University (Cardinal) · College fleet racing, College team racing 5events 2 wins together · 4 podiums · 40% win rate · 57 of 89 races won Beat 83% of the fleet together(+4 vs. without) · best 1st · Oct 2022 – Apr 2023
  • Isabelle McNabb · Stanford University (Cardinal 2), Stanford University (Cardinal) · College fleet racing, College team racing 4events 2 wins together · 3 podiums · 4 events · 45 of 70 races won Beat 85% of the fleet together(+6 vs. without) · best 1st · Oct 2022 – Apr 2023
  • Ellie Harned · Stanford University (Cardinal) · College fleet racing, College team racing 4events 2 wins together · 3 podiums · 4 events · 43 of 89 races won Beat 90% of the fleet together(+11 vs. without) · best 1st · Apr 2023 – Mar 2025
  • Jack Baldwin · Area K, Stanford University (Cardinal 2), Stanford University (Cardinal) · College team racing, Handicap 4events 1 wins together · 4 podiums · 4 events · 46 of 63 races won Beat 84% of the fleet together(+5 vs. without) · best 1st · Aug 2019 – Apr 2023
  • Thomas Sitzmann · Chapman Petersen, Stanford University (Cardinal) · College fleet racing, College match racing, Match racing 4events 3 wins together · 3 podiums · 4 events · 8 of 32 races won Beat 92% of the fleet together(+13 vs. without) · best 1st · Jun 2023 – Nov 2024
  • Jack Plummer · All In · X Boat 4events 2 wins together · 2 podiums · 4 events · 9 of 13 races won Beat 57% of the fleet together(−23 vs. without) · best 1st · Jul 2018 – Jul 2019
  • Michelle Lahrkamp · Stanford University (Cardinal) · College team racing 3events 2 wins together · 3 podiums · 3 events · 50 of 57 races won Beat 98% of the fleet together(+19 vs. without) · best 1st · Apr 2023 – May 2023
  • Thomas Whowell · All In, ALL IN · C Scow 3events 1 wins together · 1 podiums · 3 events · 2 of 13 races won Beat 95% of the fleet together(+16 vs. without) · best 1st · Aug 2019 – Jun 2024

Lift shows how much better this sailor finishes with that partner aboard.

Rating history

04078142014201620182020202220242026Helm rating, full-size sailingCrew rating, full-size sailing

— Helm rating, full-size sailing · - - Crew rating, full-size sailing

Event history · 107

DateEventBoatClassRoleFinish
31 Mar 202655 Trofeo S.A.R. Princesa SofíaUSA 218111ILCA 7 (Laser)Skipper47th / 199
19 Feb 20262026 ILCA Midwinters East ChampionshipsALL INILCA 7 (Laser)Skipper2nd / 51
1 Apr 202554 Trofeo S.A.R. Princesa SofíaUSA 218111ILCA 7 (Laser)Skipper73rd / 174
8 Mar 2025Bob Bavier Open Team RaceStanford University (Cardinal)College team racingSkipper1st / 10
15 Feb 2025Top-9 InviteStanford University (Cardinal)College fleet racingA Skipper (3-9)1st / 9
15 Nov 2024ICSA Match Race National ChampionshipStanford University (Cardinal)College match racingA Skipper4th / 10
9 Nov 2024Glen S. Foster TrophyStanford University (Chapman Petersen '26)College singlehandedSkipper5th / 18
26 Oct 2024Top-9 Fall InviteStanford University (Cardinal)College fleet racingA Skipper (1-7)1st / 9
12 Oct 2024The 33rd Captain Hurst BowlStanford University (Cardinal)College fleet racingB Skipper1st / 15
28 Sep 2024PCCSC Open Singlehanded ChampionshipStanford University (Chapman Petersen '26)College singlehandedSkipper1st / 9
21 Sep 2024PCCSC Richard Sweet Match Race ChampionshipStanford University (Cardinal)College match racingA Skipper1st / 5
12 Jun 20242024 C Scow National ChampionshipALL INC ScowSkipper1st / 55
13 Aug 2023Allianz Sailing World Championships 2023Chapman PETERSENILCA 7 (Laser)Skipper76th / 138
24 Jun 2023US Youth Championship - Rose Cup 2023Chapman PetersenMatch racingSkipper1st / 2
27 May 2023College Sailing Team Race National ChampionshipStanford University (Cardinal)College team racingSkipper2nd / 16
30 Apr 20232023 LGYC C SCOW A SERIESALL INC ScowCrew4th / 8
30 Apr 20232023 LGYC C SCOW FALL SERIESALL INC ScowCrew1st / 3
29 Apr 20232023 LGYC C SCOW B SERIESALL INC ScowCrew2nd / 5
22 Apr 2023Admirals CupStanford University (Cardinal)College fleet racingA Skipper7th / 18
8 Apr 2023PCCSC Carter Ford Team Race ChampionshipStanford University (Cardinal)College team racingSkipper1st / 8
1 Apr 2023The 40th Grey Lynne Marchiando Team RacesStanford University (Cardinal)College team racingSkipper1st / 8
11 Mar 2023Bob Bavier Open Team RaceStanford University (Cardinal)College team racingSkipper3rd / 9
25 Feb 2023McIntyre Team RaceStanford University (Cardinal 2)College team racingSkipper2nd / 6
5 Nov 2022Glen S. Foster TrophyStanford University (Chapman Petersen '26)College singlehandedSkipper1st / 18
15 Oct 20222022 Truxtun UmstedStanford University (Cardinal)College fleet racingA Skipper6th / 14

Helm rating, Full-size sailing: 705, #405.Crew rating, Full-size sailing: 270, #10,102. Compiled from public results; not an official ranking.