The Forecasters Challenge 2010

Pros v Joes

© Tangotiger

Unofficial Competition #1

The setup for the Official Competition in 2009 became the setup for the Unofficial Competition #1 in 2010. The rules here are straightforward: put the 22 professional forecasters (The Pros) into a league, and create a random draft order. And repeat this for one thousand leagues. The idea is that after so many leagues, we should reach consensus as to which Pro prefers which player. Here are the results:

fan_id points_ct wins_ct value_ct fan_tx
217 1491 420 6300 Marcel
108 1477 313 5782 Chone
115 1410 143 3344 John Eric Hanson
112 1322 12 967 FantasyPros911
132 1314 16 866 Fantistics
299 1263 17 784 Consensus
118 1254 26 774 Steamer
131 1267 12 562 Fangraphs Community
105 1275 5 494 Brad Null
113 1291 4 448 FeinSports.com
116 1230 7 363 KFFL
120 1214 6 269 Razzball
126 1224 6 263 Bloomberg Sports
102 1147 1 48 Ask Rotoman
109 1110 0 23 Chris Gehringer
129 1144 0 17 Wells Oliver
106 1104 0 3 CAIRO
125 1123 0 1 BigScoreSports
111 957 0 0 Fantasy Scope
130 848 0 0 Baseball Info Solutions
127 1077 0 0 Future of Fantasy

This was a three-horse race, with Marcel winning 420 of the 1000 leagues. Chone was a very strong second, and last year's winner, Eric Hanson, is #3. Everyone else was pretty much an also-ran.

Unofficial Competition #2

In this competition, each league was made up of only two Pros, in a head-to-head matchup. Each Pro selected 275 players. Whereas in the previous competition, you would end up after 1000 leagues with about 100 players selected at some point, in this competition, the entire draft list is critical. Basically, each of these two competitions takes an extreme view as to the importance of the draft list. Here are the results:

fan_id points_ct wins_ct fan_tx
115 14017 37 John Eric Hanson
299 14356 36 Consensus
132 13964 35 Fantistics
108 13990 33 Chone
113 13951 32 FeinSports.com
105 14061 30 Brad Null
116 13806 28 KFFL
118 13812 27 Steamer
131 13653 24 Fangraphs Community
120 13725 23 Razzball
217 13673 21 Marcel
102 13538 20 Ask Rotoman
112 13489 19 FantasyPros911
126 13358 14 Bloomberg Sports
127 13389 14 Future of Fantasy
129 12836 11 Wells Oliver
106 12930 6 CAIRO
109 13094 6 Chris Gehringer
130 12667 6 Baseball Info Solutions
111 12313 2 Fantasy Scope
125 12623 0 BigScoreSports

Lots of strong showing, with Eric Hanson eeking out the overall win, with 37 wins in 42 leagues. Chone was also strong at 33 wins. We see that the Consensus (the consensus of the other 21 Pros) was extremely strong. Marcel was middle-of-the-road.

Unofficial Competition #3

In this competition, each league was made up of only one Pro and 21 random amateurs (The Joes). The idea is that this may better model reality, where you have one Pro in a league with random baseball fans. In order to simulate a Joe, I started with the consensus pick, assigned a dollar value to each player, and then randomly assigned a dollar value that was +/- 5$ within that initial dollar value. And for 5% of the players, I drastically reduced their value (effectively making those guys persona non grata to the Joes). Each Pro faced off against the same Joes and selected from the same draft position. There were 22 different leagues for each Pro. Here are the results:

fan_id points_ct wins_ct value_ct fan_tx
132 2283 20 230 Fantistics
115 2242 19 224 John Eric Hanson
299 2180 18 218 Consensus
113 2221 17 208 FeinSports.com
120 2184 17 204 Razzball
131 2174 16 202 Fangraphs Community
108 2168 13 183 Chone
105 2142 12 174 Brad Null
102 2103 11 164 Ask Rotoman
116 2117 11 164 KFFL
112 2082 10 157 FantasyPros911
217 2078 10 153 Marcel
129 2078 10 152 Wells Oliver
126 2069 7 137 Bloomberg Sports
111 2034 6 122 Fantasy Scope
127 2014 6 114 Future of Fantasy
106 2019 5 113 CAIRO
109 1947 7 113 Chris Gehringer
118 1960 4 93 Steamer
130 1885 3 73 Baseball Info Solutions
125 1913 0 58 BigScoreSports

This time Fantistics won 20 of the 22 leagues, with Eric Hanson just behind in second place. The Consensus once again had a srong showing. Chone and Marcel were more middle-of-the-road this time. Also interesting is that The Pros, while only representing one of 22 teams in each league won 50% of the leagues. This was kinda fixed, seeing that I played with the 5% number I noted earlier to tip the scales toward The Pros. As we will see, that was a pretty good guess.

OFFICIAL COMPETITION

In this competition, each league was made up of only one Pro and 21 random Fangraphs readers (The Joes). The idea is that this may better model reality, where you have one Pro in a league with actual random baseball fans. Each Pro faced off against the same Joes and selected from the same draft position. There were 22 different leagues for each Pro. Here are the results:

fan_id points_ct wins_ct value_ct fan_tx
115 1662 17 210 John Eric Hanson
116 1588 16 201 KFFL
217 1535 15 187 Marcel
118 1617 15 185 Steamer
108 1535 15 182 Chone
132 1607 12 172 Fantistics
299 1535 12 169 Consensus
120 1584 12 166 Razzball
113 1514 11 161 FeinSports.com
112 1509 11 159 FantasyPros911
105 1504 11 158 Brad Null
109 1510 12 156 Chris Gehringer
131 1461 11 151 Fangraphs Community
127 1462 12 150 Future of Fantasy
129 1462 9 140 Wells Oliver
126 1475 6 129 Bloomberg Sports
102 1366 5 74 Ask Rotoman
111 1361 3 59 Fantasy Scope
130 1319 3 52 Baseball Info Solutions
125 1331 1 37 BigScoreSports
106 1280 0 13 CAIRO

Eric Hanson, last year's winner, wins again! He won 17 of the 22 leagues, just ahead of KFFL's 16. In a three-way tie with 15 wins was Marcel, Steam, and Chone.

The 22 Pros won 45% of the leagues, even though they only represented 5% of the teams. With 484 teams (Pros + Joes) and 484 leagues, the average is for each team to have won once. And 21 of the 22 Pros reached that level. Only 75 of the 464 Fangraphs Readers (16%) won at least once. The key point here is that just about ANY system is better than NO system. Basically, a baseball fan knows enough information to be dangerous.

Overall Results

As you can see, Eric Hanson was in contention regardless of the kind of rules setup I had. Marcel on the other hand either did great, or was average. Which competition setup do you think is more relevant? Well, that's for you to decide, which is why I ran so many different kinds of setups. The reader is free to decide for himself what best models reality. Let me also present for convenience the overall results. What I did was that for each competition, I found the mean and standard deviations of the scores, and turned them into z-Scores. Below you will find these results as a simple average:

ALL Pros H2H Joes Readers fan_id fan_tx
1.31 1.31 1.32 1.31 1.28 115 John Eric Hanson
1.24 2.68 0.99 0.50 0.78 108 Chone
0.94 2.97 0.00 -0.10 0.87 217 Marcel
0.78 -0.08 1.15 1.43 0.60 132 Fantistics
0.71 -0.12 1.24 1.20 0.54 299 Consensus
0.50 -0.31 0.91 1.00 0.40 113 FeinSports.com
0.36 -0.36 0.58 0.12 1.12 116 KFFL
0.29 -0.41 0.16 0.92 0.49 120 Razzball
0.28 -0.29 0.74 0.32 0.34 105 Brad Null
0.27 -0.25 0.25 0.88 0.22 131 Fangraphs Community
0.04 -0.02 -0.16 -0.02 0.36 112 FantasyPros911
-0.02 -0.13 0.49 -1.29 0.83 118 Steamer
-0.37 -0.55 -0.82 -0.12 0.02 129 Wells Oliver
-0.40 -0.42 -0.58 -0.41 -0.18 126 Bloomberg Sports
-0.42 -0.54 -0.08 0.12 -1.18 102 Ask Rotoman
-0.45 -0.56 -0.58 -0.87 0.20 127 Future of Fantasy
-0.59 -0.55 -1.24 -0.89 0.31 109 Chris Gehringer
-1.07 -0.56 -1.57 -0.71 -1.45 111 Fantasy Scope
-1.24 -0.56 -1.24 -0.89 -2.28 106 CAIRO
-1.26 -0.56 -1.24 -1.68 -1.57 130 Baseball Info Solutions
-1.53 -0.56 -1.73 -1.98 -1.84 125 BigScoreSports

In some cases, like Eric Hanson, he simply showed consistent excellence across the board, always at around 1.3 standard deviations from the mean. Marcel showed the biggest range, either far above the mean at 3 standard deviations in one setup, or right around the mean in two cases. Overall, this put Marcel as #3 among the 22 forecasters, with Chone placing very strongly at #2.

Thank you again to all the Pros and Fangraphs readers that made this competition possible. Everyone really stuck their necks on the line and put in their time to submit their draft lists. See you next year!