Mutually-Antagonistic Interactions in Baseball Networks

Details Mutually-Antagonistic Interactions in Baseball Networks Mutually-Antagonistic Interactions in Baseball Networks

2009-07-30

arxiv.org/abs/0907.5241v2

Physics

Data Analysis, Statistics and Probability

A few clarifications added 14 pages, 2 tables, 6 figures. Submitted

Scientific paper

We formulate the head-to-head matchups between Major League Baseball pitchers and batters from 1954 to 2008 as a bipartite network of mutually-antagonistic interactions. We consider both the full network and single-season networks, which exhibit interesting structural changes over time. We find interesting structure in the network and examine their sensitivity to baseball's rule changes. We then study a biased random walk on the matchup networks as a simple and transparent way to compare the performance of players who competed under different conditions and to include information about which particular players a given player has faced. We find that a player's position in the network does not correlate with his success in the random walker ranking but instead has a substantial effect on its sensitivity to changes in his own aggregate performance.

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