BPV by time through lineup, 2023

Let's wrap-up our mid-season one-split-away theme by looking at the stats and skills posted by starting pitchers as they go through lineups during the game.

There is a clear erosion in ERA and WHIP the more times a SP goes through a lineup during a game. The same holds true for their underlying skills, as BPV, K-BB%, and HR/9 also show a high level of in-game deterioration.

Here are the starting pitchers in 2023 whose skills erode the most as they go through lineups:

Let's take a look at some significant BPV by time through lineup splits so far in 2023 by focusing on those guys with the widest variances. The goal of this exercise is to identify pitchers who could be an adjustment away from making significant improvement.
 

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