Donkey Jack
#30J/105 · 26 · StFYC
1257
-15±38
Overall Rank
#30
of 1161
Percentile
Top 3%
of 1161 boats
Rating
1257
Confidence
±38
High
Races
189
Recent Form
+1
avg last 5 races
Last raced: May 17, 2026
Rating Over Time
1332+277Direct Competitors
Boats Donkey Jack has raced against most often, with head-to-head finish record.
BlackhawkUSA 40
J/105 · Rating 1223
43–132
25% wins · 175 races
Arbitrage116
J/105 · Rating 1259
68–101
40% wins · 169 races
Akula16
J/105 · Rating 1203
84–74
53% wins · 158 races
Jabberwocky149
J/105 · Rating 1208
93–49
65% wins · 142 races
Ne*Ne003
J105 · Rating 1332
32–100
24% wins · 132 races
Juju147
J/105 · Rating 1094
116–16
88% wins · 132 races
Box of Rain46
J105 · Rating 1157
85–40
68% wins · 125 races
Mojo119
J/105 · Rating 1268
44–79
36% wins · 123 races
Race History
188 racesElite Fleet Regatta · R5
May 17, 2026/11 of 23
-15
1332
Elite Fleet Regatta · R4
May 17, 2026/6 of 23
+5
1347
Elite Fleet Regatta · R3
May 16, 2026/6 of 23
+4
1341
Elite Fleet Regatta · R2
May 16, 2026/11 of 23
-19
1338
Elite Fleet Regatta · R1
May 16, 2026/1 of 23
+29
1357
Friday Night Races April 3 to September
Apr 24, 2026/2 of 11
-2
1328
SYC J/105 J/88 Spring Invitational Regatta · R6
Mar 22, 2026/3 of 20
+19
1330
SYC J/105 J/88 Spring Invitational Regatta · R5
Mar 22, 2026/15 of 20
-37
1310
SYC J/105 J/88 Spring Invitational Regatta · R4
Mar 22, 2026/12 of 20
-32
1347
SYC J/105 J/88 Spring Invitational Regatta · R3
Mar 21, 2026/2 of 20
+14
1379
SYC J/105 J/88 Spring Invitational Regatta · R2
Mar 21, 2026/3 of 20
+14
1366
SYC J/105 J/88 Spring Invitational Regatta · R1
Mar 21, 2026/1 of 20
+29
1351
10th Anniversary of the Auxiliary Cup · R2
Oct 4, 2025/1 of 5
+5
1322
10th Anniversary of the Auxiliary Cup · R1
Oct 4, 2025/2 of 5
-3
1318
Rolex Big Boat Series · R7
Sep 14, 2025/2 of 27
+6
1321
Rolex Big Boat Series · R6
Sep 13, 2025/9 of 27
-8
1315
Rolex Big Boat Series · R5
Sep 13, 2025/16 of 27
-22
1323
Rolex Big Boat Series · R4
Sep 12, 2025/7 of 27
-10
1345
Rolex Big Boat Series · R3
Sep 12, 2025/2 of 27
+1
1355
Rolex Big Boat Series · R2
Sep 11, 2025/3 of 27
-1
1354
About the Rating
Ratings are computed using Glicko-2, a chess-style system that considers who you beat and who beat you. Winning against higher-rated boats earns more points than beating lower-rated boats.
The overall rank compares this boat to all others across every class. To see how it stacks up within its class, use the “View all J/105” link above.
The confidence band (±38) shows how certain we are about this rating. It narrows as more races are completed and widens during periods of inactivity.
The shaded area on the chart represents the 95% confidence interval — the true skill of this boat likely falls within that range.