Monday, July 31, 2017

Beat the Streak Picks

Here are the top picks my programs produced for use in Beat the Streak. This post mostly explains the ideas behind the calculations. In addition, this post shows tests on the Neural Network (NN). This post discusses an NN that includes the ballpark. I recently updated the models, and the results of those tests are here.

For 2017, I am just going to publish the Log5 hit averages and the NN probabilities with parks factored in. I am keeping track of the results here. I added a graph that gives a visual representation of the probability and success each day. The sheet also includes a table that summarizes the length of positive and negative streaks.

First, the Log5 Method picks:

0.319 — Jose Altuve batting against Alex Cobb
0.306 — Ryon Healy batting against Matt Cain
0.302 — Jose Ramirez batting against Doug Fister
0.297 — Daniel Murphy batting against Jose Urena
0.291 — Eric Hosmer batting against Ubaldo Jimenez
0.289 — Jaycob Brugman batting against Matt Cain
0.286 — Jed Lowrie batting against Matt Cain
0.286 — Michael Brantley batting against Doug Fister
0.285 — Whit Merrifield batting against Ubaldo Jimenez
0.284 — Yonder Alonso batting against Matt Cain
0.284 — Brandon Phillips batting against Nick Pivetta

On a day with a light schedule, Matt Cain’s poor pitching brings a number of Oakland Athletics players to the top of the list. Let’s see if they survive the NN. Someone like rookie Jaycob Brugman doesn’t have the plate appearances to give him a great three-year hit average, and the NN won’t give him much credit for that.

Here is how the NN with Park ranks the players:

0.319, 0.771 — Jose Altuve batting against Alex Cobb.
0.297, 0.750 — Daniel Murphy batting against Jose Urena.
0.302, 0.737 — Jose Ramirez batting against Doug Fister.
0.265, 0.722 — Jean Segura batting against Cole Hamels.
0.291, 0.718 — Eric Hosmer batting against Ubaldo Jimenez.
0.284, 0.717 — Brandon Phillips batting against Nick Pivetta.
0.286, 0.716 — Michael Brantley batting against Doug Fister.
0.285, 0.715 — Whit Merrifield batting against Ubaldo Jimenez.
0.306, 0.714 — Ryon Healy batting against Matt Cain.
0.281, 0.712 — Ender Inciarte batting against Nick Pivetta.

Jose Altuve is the unanimous pick. Only Healy survives in the top ten against Matt Cain. I might be inclined to go with Jose Ramirez today, who is facing a poor pitcher in a better park for hitters. We’re also at the point in the season when we’re running out of time for picking one player a day. Doubling down is becoming more important.

As always, your best pick will fail to get a hit about 25% of the time.

Here is the daily list of active streaks of plate appearances without a hit, with pitchers eliminated:

Batter PA since Last Hit
John Jaso 37
Michael Freeman 34
Raul Mondesi 23
Aaron Hill 23
Jarrod Saltalamacchia 23
Rene Rivera 20
Mark Trumbo 20
Kyle Higashioka 20
Christopher Herrmann 20
Jorge Soler 18
Mark Zagunis 18
Ruben Tejada 18
Adam Engel 17
Taylor Featherston 17
Keon Broxton 16
Tony John Wolters 16
Jorge Polanco 16
Chase D'Arnaud 15
David Peralta 15
Rio Ruiz 15
Paul Janish 15
Greg Bird 15
Cristhian Adames 14
Ryan Schimpf 14
Emilio Bonifacio 14
Arismendy Alcantara 14
Dexter Fowler 14
Kendrys Morales 14
Stephen Drew 13
Yulieski Gurriel 13
Freddie Freeman 13
Chris Coghlan 13
Avisail Garcia 12
Nick Castellanos 12
Martin Prado 12
Bryce Harper 12
Todd Frazier 12
Nolan Fontana 12
Nick Ahmed 12
Alex Presley 11
Timothy Beckham 11
Allen Cordoba 11
Martin Maldonado 11
Danny Ortiz 11
James Adduci 11
Jonathan Villar 11
Brock Stassi 11
Denard Span 11
Aaron Judge 11
Scott Van Slyke 11
Lewis Brinson 11
Anthony Rizzo 11
Kevin Plawecki 11
Ian Happ 11
Jabari Blash 10
Tom Murphy 10
Jared W. Hoying 10
Luis Sardinas 10
Tyler Collins 10
Austin Barnes 10
Adrian Gonzalez 10
Josh Harrison 10
JaCoby Jones 10
Nick Williams 10
Yandy Diaz 10
Francisco Cervelli 10
Sean Rodriguez 10
Carlos Correa 10

Good luck!



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