Jack Welburn

Rating History

Singlehanded & Keelboat Ratings

DisciplineRating Rank RacesLast raced
Singlehanded3.11unranked (fewer than 10 races or not active)9Fall 2022

Team Race Rating

Rating Rank vs fleet rating Record
3.10 (fleet 4.15) 30 of 328 +0.09 ± 0.12
about what the fleet rating predicts
as skipper 217–105 (67%)
SeasonRegattas Skipper W–LCrew W–L
Spring 2026767–34—
Spring 2025768–35—
Spring 2024775–34—
Spring 202327–2—
2.252.52.7533.25Spring 2023Spring 2024Spring 2025Spring 2026Admiral Moore Open Team Race (2023-03-25): rating 2.17, fleet rating alone 2.17, offset -0.00; record 1-0 in this boatAdmiral Moore Open Team Race (2023-03-25): rating 2.17, fleet rating alone 2.17, offset -0.00; record 3-1 in this boatDC Team Race / GW (2024-03-02): rating 2.66, fleet rating alone 2.64, offset +0.01; record 8-0 in this boatSt. Mary's Team Race Inter-Conference (2024-03-09): rating 2.72, fleet rating alone 2.66, offset +0.07; record 15-6 in this boatGraham Hall Team Race (2024-03-16): rating 2.75, fleet rating alone 2.66, offset +0.10; record 10-5 in this boatAaron Szambecki Team Race (2024-03-23): rating 2.77, fleet rating alone 2.68, offset +0.09; record 2-0 in this boatAaron Szambecki Team Race (2024-03-23): rating 2.77, fleet rating alone 2.68, offset +0.09; record 4-0 in this boatAaron Szambecki Team Race (2024-03-23): rating 2.77, fleet rating alone 2.68, offset +0.09; record 7-4 in this boatMAISA Open Team Race/Prosser Trophy (2024-04-06): rating 2.81, fleet rating alone 2.69, offset +0.12; record 6-0 in this boatMAISA Open Team Race/Prosser Trophy (2024-04-06): rating 2.81, fleet rating alone 2.69, offset +0.12; record 7-1 in this boatThompson Trophy-CGA (2024-04-13): rating 2.85, fleet rating alone 2.70, offset +0.15; record 10-9 in this boatICSA Open Team Racing National Championship (2024-04-25): rating 2.94, fleet rating alone 2.80, offset +0.14; record 6-9 in this boatGW Team Race (2025-03-01): rating 2.96, fleet rating alone 2.86, offset +0.11; record 2-0 in this boatGW Team Race (2025-03-01): rating 2.96, fleet rating alone 2.86, offset +0.11; record 5-1 in this boatSt. Mary's College of MD Team Race (2025-03-08): rating 2.98, fleet rating alone 2.88, offset +0.10; record 3-11 in this boatSt. Mary's College of MD Team Race (2025-03-08): rating 2.98, fleet rating alone 2.88, offset +0.10; record 4-1 in this boatGraham Hall Team Race (2025-03-15): rating 2.99, fleet rating alone 2.91, offset +0.07; record 1-0 in this boatGraham Hall Team Race (2025-03-15): rating 2.99, fleet rating alone 2.91, offset +0.07; record 3-0 in this boatGraham Hall Team Race (2025-03-15): rating 2.99, fleet rating alone 2.91, offset +0.07; record 10-1 in this boatAaron Szambecki Team Race (2025-03-22): rating 3.05, fleet rating alone 2.95, offset +0.10; record 7-0 in this boatAaron Szambecki Team Race (2025-03-22): rating 3.05, fleet rating alone 2.95, offset +0.10; record 7-2 in this boat2025 Marchiando Trophy-Grey Regatta (2025-03-29): rating 3.07, fleet rating alone 2.94, offset +0.12; record 10-11 in this boatProsser Trophy - MAISA Team Race Championship (2025-04-05): rating 3.06, fleet rating alone 2.96, offset +0.10; record 7-0 in this boatICSA Open Team Race National Championship (2025-04-24): rating 3.10, fleet rating alone 2.99, offset +0.11; record 9-8 in this boatNelson Roltsch Team Race (2026-02-28): rating 3.14, fleet rating alone 3.05, offset +0.09; record 7-3 in this boatSt. Mary's Team Race Inter-Conference (2026-03-07): rating 3.15, fleet rating alone 3.06, offset +0.09; record 5-4 in this boatGraham Hall Team Race (2026-03-14): rating 3.11, fleet rating alone 3.02, offset +0.08; record 2-0 in this boatGraham Hall Team Race (2026-03-14): rating 3.11, fleet rating alone 3.02, offset +0.08; record 4-5 in this boatGraham Hall Team Race (2026-03-14): rating 3.11, fleet rating alone 3.02, offset +0.08; record 6-3 in this boatAaron Szambecki Team Race (2026-03-21): rating 3.10, fleet rating alone 3.02, offset +0.08; record 6-2 in this boatThe Lynn Marchiando Trophy Team Race-2026 (2026-03-28): rating 3.06, fleet rating alone 2.97, offset +0.09; record 13-5 in this boatProsser Trophy MAISA Open Team Race Championship (2026-04-04): rating 3.07, fleet rating alone 2.97, offset +0.10; record 14-1 in this boatICSA Open Team Race National Championship (2026-04-23): rating 3.10, fleet rating alone 3.00, offset +0.10; record 10-11 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 23 graded regattas (322 matches) the record is 217–105 against 215.7 wins the pre-event forecasts expected (+1.3). 5 regattas clearly above the rating (P ≤ 20%), 8 clearly below (P ≥ 80%); 23 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2026-04-23ICSA Open Team Race National Championshipskipper3.703.5910–1110.5−0.110.068%
2026-04-04Prosser Trophy MAISA Open Team Race Championshipskipper3.674.9914–112.2+1.331.517%
2026-03-28The Lynn Marchiando Trophy Team Race-2026skipper3.663.7913–512.6+0.130.054%
2026-03-21Aaron Szambecki Team Raceskipper3.673.726–25.9+0.050.067%
2026-03-14Graham Hall Team Raceskipper3.703.0212–814.1−0.681.093%
2026-03-07St. Mary's Team Race Inter-Conferenceskipper3.722.405–46.7−1.311.698%
2026-02-28Nelson Roltsch Team Raceskipper3.693.587–37.1−0.110.071%
2025-04-24ICSA Open Team Race National Championshipskipper3.703.439–89.9−0.270.278%
2025-04-05Prosser Trophy - MAISA Team Race Championshipskipper3.616.617–05.7≥+3.002.121%
2025-03-292025 Marchiando Trophy-Grey Regattaskipper3.622.8610–1113.2−0.751.796%
2025-03-22Aaron Szambecki Team Raceskipper3.484.6514–211.2+1.172.29%
2025-03-15Graham Hall Team Raceskipper3.474.9514–112.0+1.481.913%
2025-03-08St. Mary's College of MD Team Raceskipper3.252.227–1210.4−1.022.498%
2025-03-01GW Team Raceskipper3.413.137–17.2−0.280.082%
2024-04-25ICSA Open Team Racing National Championshipskipper3.512.926–97.7−0.580.790%
2024-04-13Thompson Trophy-CGAskipper3.423.0410–911.4−0.380.484%
2024-04-06MAISA Open Team Race/Prosser Trophyskipper3.404.8913–110.7+1.482.111%
2024-03-23Aaron Szambecki Team Raceskipper3.323.8913–411.3+0.570.725%
2024-03-16Graham Hall Team Raceskipper3.253.1710–510.2−0.080.068%
2024-03-09St. Mary's Team Race Inter-Conferenceskipper3.183.7215–613.4+0.540.627%
2024-03-02DC Team Race / GWskipper3.086.088–05.9≥+3.003.67%
2023-03-25Admiral Moore Open Team Raceskipper2.513.504–13.2+1.000.638%
2023-03-11Graham Hall Team Raceskipper2.502.053–13.3−0.450.186%

Regatta results

Regatta Role Div Races Avg Rating
Spring 2026 Team page Season
St. Mary's Team Race Inter-Conference Skipper TR 9 56% —
Prosser Trophy MAISA Open Team Race Championship Skipper TR 14 93% —
Nelson Roltsch Team Race Skipper TR 10 70% —
The Lynn Marchiando Trophy Team Race-2026 Skipper TR 18 72% —
ICSA Open Team Race National Championship Skipper TR 22 50% —
Graham Hall Team Race Skipper TR 20 60% —
Aaron Szambecki Team Race Skipper TR 13 62% —
Fall 2025 Team page Season
College Sailing Match Race National Championship Keelboat Crew A 1 8.0 —
Open Atlantic Coast Championship Round 1B Skipper B 5 8.2 3.79
Chesapeake Invitational Skipper C 10 7.0 1.30
Spring 2025 Team page Season
St. Mary's College of MD Team Race Skipper TR 19 37% —
Prosser Trophy - MAISA Team Race Championship Skipper TR 7 100% —
Open Eastern Semi Finals Skipper B 7 7.1 4.06
ICSA Open Team Race National Championship Skipper TR 15 53% —
GW Team Race Skipper TR 8 88% —
Graham Hall Team Race Skipper TR 15 93% —
America Trophy Skipper B 1 1.0 —
Aaron Szambecki Team Race Skipper TR 17 88% —
2025 Marchiando Trophy-Grey Regatta Skipper TR 21 48% —
Fall 2024 Team page Season
War Memorial Skipper B 12 4.9 4.08
Open Atlantic Coast Championship Round 1A Skipper B 18 7.1 4.23
Open Atlantic Coast Championship Final Skipper B 7 11.4 3.68
MAISA Top 9 Open Skipper A 16 6.9 3.60
Danmark Trophy Skipper B 8 8.6 4.38
Chesapeake Invitational Skipper B 14 5.6 1.91
Spring 2024 Team page Season
Thompson Trophy-CGA Skipper TR 19 53% —
St. Mary's Team Race Inter-Conference Skipper TR 21 71% —
MAISA Open Team Race/Prosser Trophy Skipper TR 13 92% —
Open Dinghy National Championship Skipper B 17 8.8 4.49
ICSA Open Team Racing National Championship Skipper TR 15 40% —
Graham Hall Team Race Skipper TR 15 67% —
Eastern Open National Semi-Final Skipper B 6 8.8 3.82
DC Team Race / GW Skipper TR 8 100% —
America Trophy - Conference Championship Skipper B 1 2.0 —
Aaron Szambecki Team Race Skipper TR 15 80% —
Fall 2023 Team page Season
WAR MEMORIAL Skipper B 10 5.3 4.08
Riley Cup Skipper A 4 5.8 2.99
Open ACCs Round 1B Skipper B 6 11.0 3.30
Danmark Trophy Skipper B 14 8.5 4.38
Chesapeake Open Skipper A 12 4.1 4.55
Atlantic Coast Open Championship Finals Skipper B 11 8.0 4.60
Spring 2023 Team page Season
College Sailing Open Eastern Semifinal Skipper B 4 8.8 3.80
Graham Hall Team Race Skipper TR 12 58% —
Admirals Cup Skipper B 10 10.0 3.63
Admiral Moore Open Team Race Skipper TR 17 53% —
Fall 2022 Team page Season
Washington College Fall Open Skipper A 9 2.2 3.94
Tom Curtis Memorial Regatta Skipper A 8 6.5 3.27
Oyster Bowl Skipper B 9 10.7 1.53
Laser South Singlehanded Skipper A 9 12.7 2.35

Linked Profiles

League Name School Year
ISSA Jack Welburn Wellesley High SchoolWellesley High School '22

From the notes

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

All notes →