The Electrical World, December 6, 1913, pages 1147-1148:

Electrical  Service  at  Harvard-Yale  Football  Game
operators    Although electricity played a more prominent part in the reporting of the recent world's series of baseball games than in the football season just closed, it was an important factor in the transmission of scores all over the country from the Harvard-Yale game in Cambridge on Nov. 22. About fifty telegraph operators with an expert knowledge of the game were stationed on top of the Harvard Stadium and connected by Western Union, Postal and American Telephone & Telegraph circuits with many of the principal cities of the East. Newspaper service hot from the gridiron was given by direct wires running as far west as Chicago, and New York, Philadelphia, Washington and other places prominent in sporting circles kept close "tabs" on the pigskin during the historic struggle for its possession. Nearly 50,000 persons attended the game, about half of whom were transported to and from the grounds by the Boston Elevated Railway, which, in addition to a large extra surface car service, ran four-car trains on a two-minute headway in the Cambridge subway for two hours before and two hours after the game. The largest number of telegraph circuits from the field were operated by the Western Union company, which had thirty wires in commission. Two operators placed in the players' dugouts on each side of the field kept the press operators in touch with all changes in line-up. The New England Telephone & Telegraph Company operated a special talking circuit from the side lines to the Cambridge exchange, whence the scores were relayed to all offices in the Boston metropolitan district.