Saturday, September 23, 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:

0.324 — Daniel Murphy batting against Matt Harvey
0.319 — Eric Hosmer batting against Dylan Covey
0.314 — Lorenzo Cain batting against Dylan Covey
0.313 — Howie Kendrick batting against Matt Harvey
0.310 — Whit Merrifield batting against Dylan Covey
0.309 — Melky Cabrera batting against Dylan Covey
0.306 — Trea Turner batting against Matt Harvey
0.298 — Jose Altuve batting against Bud Norris
0.294 — Eddie Rosario batting against Matt Boyd
0.294 — Ryan Zimmerman batting against Matt Harvey
0.294 — Adam Lind batting against Matt Harvey

The Mets are doing something strange today where they are starting Noah Syndergaard, but he is only going to pitch an inning. Matt Harvey comes in for the rest of the game (or however long he lasts). So I’m using Harvey in the calculation.

Here is how the NN with Park ranks the players:

0.298, 0.754 — Jose Altuve batting against Bud Norris.
0.324, 0.752 — Daniel Murphy batting against Matt Harvey.
0.319, 0.732 — Eric Hosmer batting against Dylan Covey.
0.286, 0.732 — Dee Gordon batting against Taijuan Walker.
0.306, 0.731 — Trea Turner batting against Matt Harvey.
0.314, 0.729 — Lorenzo Cain batting against Dylan Covey.
0.287, 0.729 — Eduardo Nunez batting against Robert Stephenson.
0.282, 0.726 — Charlie Blackmon batting against Jhoulys Chacin.
0.313, 0.726 — Howie Kendrick batting against Matt Harvey.
0.310, 0.724 — Whit Merrifield batting against Dylan Covey.
0.309, 0.722 — Melky Cabrera batting against Dylan Covey.

Murphy is the consensus first pick.

Given the poor performance of the NN late in the season compared to the middle of the season, I wonder if I should build in a parameter that indicates how far the season progressed? That will be an improvement project for this winter.

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
Arismendy Alcantara 24
Jorge Soler 24
Aaron Hill 23
Jarrod Saltalamacchia 23
Kyle Higashioka 20
Mitch Moreland 20
Adam Duvall 20
Jose Bautista 19
Taylor Featherston 19
Luis Valbuena 18
Mark Trumbo 18
Mark Zagunis 18
Ronald Torreyes 17
Stuart Turner 17
Joc Pederson 16
Adam Rosales 16
Daniel Descalso 16
Zach Granite 15
Jackie Bradley, Jr. 15
Adam Engel 15
Paul Janish 15
Chase D'Arnaud 15
Wil Myers 15
Jett Bandy 15
Ryan Schimpf 14
Jordan Luplow 14
Emilio Bonifacio 14
Tom Murphy 14
Cristhian Adames 14
Francisco Cervelli 14
Taylor Motter 13
Lewis Brinson 13
Justin Smoak 13
Nolan Fontana 13
Tyler Saladino 13
Stephen Drew 13
Odubel Herrera 13
Chris Coghlan 13
Rajai Davis 13
Willie Calhoun 12
Martin Prado 12
Carlos Correa 12
Ryan McMahon 12
George Springer 12
Pedro Severino 12
Nick Ahmed 12
Jarrod Dyson 12
Maikel Franco 11
Brock Stassi 11
Rafael Bautista 11
Dansby Swanson 11
Carlos Beltran 11
Scott Van Slyke 11
Danny Ortiz 11
Tyler Collins 11
Sean Rodriguez 11
Zach Vincej 10
Kristopher Negron 10
Hunter Pence 10
Jayson Werth 10
Delino Deshields Jr. 10
Danny Valencia 10
Austin Romine 10
Justin Upton 10
Luis Sardinas 10
Anthony Kemp 10
Trayce Thompson 10
Rougned Odor 10
Andrew Susac 10
Adrian Gonzalez 10
Carlos Moncrief 10
Guillermo Heredia 10

Good luck!



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