[Syd Thrift]

Originally Posted by kq76

Thanks! It was Earnshaw Cook's Percentage Baseball. Though the idea was apparently used in game 7 of the World Series. Who knows when the very first use was.

I distinctly remember the Reds using Ted Power in that role in the 1990 NLCS but apparently the World Series game you’re referring to was back in 1924:

https://en.wikipedia.org/wiki/Opener_(baseball)