Research for my next book, about the OaklandA’s dynasty of the 1970s, to be published by Houghton Mifflin in 2015, has turned up boundless examples of unwritten rules from that bygone era. The latest is from July 4, 1972, in which a future Hall of Famer discusses some possible gamesmanship in Chicago. From the Oakland Tribune:
After his two-hitter against California, Catfish Hunter made some allegations against the White Sox. In his previous start, in Chicago, Hunter was beaten, 4-0, by White Sox knuckleballer Wilbur wood.
“The baseballs are bigger in Chicago when you pitch against Wood,” Catfish charged. “You can tell that when you get the ball in your hand. When you pitch 200 to 220 innings a year, you can tell by just holding one. The seams are a lot higher. I talked to [Angels left-hander] Clyde Wright before the game, and and he said he noticed the same thing pitching against Wood in Chicago. He said he threw six baseballs back and couldn’t find one the right size. All they’ve got to do is wet them and then dry them out. That makes them bigger.”
Larger seams on the baseball would add flutter to Wood’s knuckler.
Wood won 24 games for the White Sox that year, pitching a modern-era record 376.2 innings and finishing second in the Cy Young Award voting.