[1] Ray also reportedly beat University of Chicago football star Walter Eckersall in a 100-yard dash while attending Illinois.

[2] According to his biography at the Pro Football Hall of Fame, Ray was five feet, six inches tall and weighed only 136 pounds.

[3] After graduating from the University of Illinois, Ray served as the athletic director at the Smith Academy in St. Louis from 1907 to 1908.

The "Play Situations Book" taught officials, coaches, and players the rules through example and standardized their implementation.

"[2] George Halas persuaded the NFL to hire Ray in 1938 to rewrite its rules book and train its officials.

"[10] In his later years, however, Ray was criticized for becoming overly technical, "inundating his officials with memoranda," urging them to speed up play, call all fouls, and stop the clock.

[10] Ray resigned as the NFL's technical adviser in May 1952; he said at the time that he no longer felt he could physically do the job.

[12][13] In March 1966, Ray was posthumously elected to the Pro Football Hall of Fame as part of its fourth class of inductees.

"[15] Stangeland wrote the book "to set the record straight about Hugh L. Ray's true role in American football history.