CT Images of 1907 Cubs-Tigers World Series Ball Reveal no Cork or Rubber Center

Drs. Richard Heller and Kate Feinstein and the University of Chicago Medicine CT team recently helped Grant DePorter, CEO of Harry Caray’s restaurants, investigate a set of World Series balls from 1907 and 1908.  The CT scans revealed that a 1907 ball has no rubber or cork center.

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Images of final-out baseballs from (left to right): the 1908 NL clincher, 1907 World Series, 1908 World Series, 1945 World Series, and Addison Russell’s grand slam ball from November 1, 2016.

From the Chicago Sun Times:
"A manufacturer in New York declared around the turn of the century that its own 'professional dead balls are made of all yarn without rubber and are the deadest balls made.' Those balls were floating about in the early 1900s.

Back in that day, the home teams provided the balls for all games, and the assumption here is the sneaky Tigers — or somebody in cahoots with them — used some dead balls in an attempt to stop the Cubs’ high-powered offense."

Read the full story here,
"Cub-hating at its core: How sly scheme tried to bring down 1907 Cubs"