this post was submitted on 30 Aug 2024
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Data is Beautiful

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"I created this visualization to track Shohei Ohtani’s pursuit of a 50-50 season—achieving 50 home runs and 50 stolen bases in a single MLB season. Using data from ESPN, I simulated the remainder of his season to estimate the probabilities of reaching the "clubs": 30-30, 40-40, and 50-50.

The 50-50 club refers to a player hitting 50 home runs and stealing 50 bases in a single season, which has never been accomplished in MLB history. It requires a rare combination of power and speed: the 40-40 club (40 HR, 40 SB) had been joined by only five players before this year.

I built a simulation model to project Ohtani’s performance over the remaining games of the season. The model uses his current stats as a baseline and generates a range of possible outcomes based on typical variability in player performance. To stabilize the projection at the beginning of the season, I used a Bayesian prior based on his historical stats. As the season goes on, the prior is given less weight so that the current season's rates start to take over.

Data Source: ESPN

Tools Used: Pandas, NumPy, Matplotlib"

Source: https://old.reddit.com/r/dataisbeautiful/comments/1f4a1pc/oc_visualizing_shohei_ohtanis_chase_for_a_5050/

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[–] [email protected] 1 points 2 months ago

Thanks! I know jack shit about this sport but find the simulation interesting.

Two things especially:

  • the probability jump when each day is calculated (going actually backwards) and
  • a 100% outcome prediction even for the 40/40 reached basically in the last two days.

These two in combination make me think that the model seems to be set for an optimistic pattern, is that a reasonable deduction?