Historical Pitcher Usage

How long do starters go, how many relievers, etc.

Here’s the simplest measurement, one obtainable from Retrosheet game logs: the average number of pitchers used in one game by one team.

usage20110226.png

The DH is certainly a factor from 1973 on, but it looks like it was falling anyway in the two seasons prior.

I wonder if we’ve reached a limit at 4 per game. Might be the max for a 25-man roster.

More to come…

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