Henry B. McElroy (Mac) was born on September 28, 1897, in Pittsburgh, Pennsylvania. Although he was born up North, he was still very well-known in the South, especially at Texas A&M. McElroy not only graduated from Texas A&M College in 1938, but he also worked there as the Assistant Information Director. During his career at Texas A&M, McElroy wrote various articles on sports, events at Texas A&M, and events across Texas.

McElroy wasn't just an information director, but he was also a correspondent for the Associated Press, United Press, International News Service, and several Texas newspapers. He was the co-founder of the projection of football statistics, and he was on the All-American Board of Boston Record.

Along with writing articles for newspapers, McElroy wrote articles for magazines such as "Esquire", and he co-authored the book "The Twelfth Man". McElroy was also a veteran of both World Wars.

After working at Texas A&M for several years, opened a public relations firm in Houston, Texas. He was also a member of the Masonic Lodge, and in 1969 he was inducted into the Helms Athletic Hall of Fame.

Upon retirement, he moved back to College Station where he was on the council for the nominations to the Texas A&M Hall of Fame. On March 25, 1976, McElroy passed away.