The Little League That Could: A History of the American Football League - Ken Rappoport - Google Books

https://books.google.de/books?id=vNBDzHk4uD8C&pg=PA48&lpg=PA48&dq=%22tight+I%22+I+formation&source=bl&ots=nSVcdtjSTW&sig=rxKwPqe

Wearing borrowed uniforms, practicing on obscure college campuses, and led by a former Marine Corps W.W. II fighter ace as commissioner, the American Football League (AFL) debuted in the Fall of 1960 to challenge the monopoly of the well-established…