Upper Deck – SABR's Baseball Cards Research Committee
Controversial postseason pitching decisions
Peter Imber – pawnedaccordion
In 1973, new fashion for baseball umpires was strictly a judgment call - The Boston Globe
Peter Imber – pawnedaccordion
Referee Magazine - August 2022 by Referee Magazine - Issuu
Selection of Don Doxsie's columns and other stories from recent years
Stu Cowan: It has been quite a journey from N.D.G. for former umpire Jim McKean
Books and Blogs – SABR's Baseball Cards Research Committee
Baseball - New World Encyclopedia