For a decade, Elinor Kaine Penna was the ultimate football insider, bringing the ins and outs of the nascent pro game to its fans. For SB Nation, Natalie Weiner interviews Penna—now decades removed from the press box—and highlights her ascendancy in the 1960s as an NFL reporter and whose newsletter, Lineback, became the sole imprimatur of a truly knowledgeable football fan.