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Neat. I've been wanting to do something similar to this for basketball (and eventually baseball, hockey, soccer, etc.).
Was the data fairly accessible?
I didn't get very far in looking into it, but it seemed like the gamelogs were behind a paywall.
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I've built a similar model for NCAA basketball, and it looks like professional basketball data is available:
https://www.basketball-reference.com/
The basic data can be scraped from the tables for free. Deeper information might be behind a paywall, but I think you could create a basic model from the data that is freely available.
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Thanks. I only actually need the game logs and I'll eventually want to integrate college and international into the model.
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Most of the inputs come from Pro Football Reference. I basically use a bunch of general performance indicators (win/loss ratio, total points scored, etc) along with offensive/defensive performance data (passing, rushing, penalities, etc) and do a binary classification.
I trained the model using statistics from every game since 2004.