The original usage of "doubleheader" is attributed to the 1900s railway industry to refer to two locomotives pulling a particularly long and heavy train (cit. Railroad Commission of Texas, http://www.lib.utexas.edu/taro/tslac/10226/tsl-10226.html)
Baseball Has a Dearth of Doubleheaders; Two for the Price of One Just Doesn't Make Economic Sense to Big-League Teams
Jul 04, 1989; In September 1987 Pope John Paul II said Mass before 63,000 of the faithful at Dodger Stadium. The next day the Los Angeles...