Cy Seymour was arguably one of the best pitchers turned hitters that baseball has seen, yet he remains almost forgotten. Before he was a centerfielder, the 1905 NL batting champ started his career as pitcher in 1896. Seymour pitched 3 full seasons and had the league leading strikeout rate in all three. Even though Seymour’s career strikeout rate does not look impressive, when strikeouts are normalized, his rate is the best baseball has ever seen (1871-2011 min. 1000 IP). (For a biography and analysis of Seymour’s career, see this wonderful piece by Bill Kirwin.)
Andy’s recent posts on normalizing strikeouts piqued my interest and I thought that it might be interesting to normalize the strikeouts for every pitcher in major league history. This was done by using the Lahman Database and applying the following method:
- For each league in each season I calculated the league rate of SO/IP.
- Each player in that league was assigned an expected number of strikeouts based on his IP that season.
- Each player’s season-by-season expected strikeouts were added up for his career and compared it to his actual career totals.
Using this method provides us with the following leaders in ratio of SO:Expected SO (min. 1000 IP) since 1871. Continue reading



