Sonora Winter League () Encyclopedia and History

League History

Year	Tm
1961	Ciudad Obregon, Empalme, Guaymas, Hermosillo
1960	Ciudad Obregon, Empalme, Guaymas, Hermosillo
1959	Empalme, Guaymas, Hermosillo, Navojoa
1958	Ciudad Obregon, Empalme, Guaymas, Hermosillo

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Much of the play-by-play, game results, and transaction information both shown and used to create certain data sets was obtained free of charge from and is copyrighted by RetroSheet.

Win Expectancy, Run Expectancy, and Leverage Index calculations provided by Tom Tango of InsideTheBook.com, and co-author of The Book: Playing the Percentages in Baseball.

Total Zone Rating and Wins above Replacement calculations provided by Sean Smith of BaseballProjection.com.

Full-year historical Major League statistics provided by Pete Palmer and Gary Gillette of 24-7 Baseball.

Player head shots courtesy of David Davis. Many thanks to him. We have only selected seasons (players who debuted before 1960) for which we believe the image has reverted into the public domain. We will quickly remove any images for which that can be shown to not be the case.Please let us know if you are aware of any such images on this site.

Play Index Loading Photos from the George Grantham Bain Collection at the Library of Congress.

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