The president’s expected attendance at Sunday’s Super Bowl highlights how his connection to the league has veered from aspirational to openly antagonistic.

TV advertising is the lifeblood of the league, but knowing when to pause the games is a task undertaken by N.F.L. executives, network producers and on-field officials.

Despite its brevity, the rush to spear giant sturgeon in Cheboygan, Mich., is important to the local economy.

Monday night’s game in Arizona between the Los Angeles Rams and the Minnesota Vikings is the first time the league has relocated a postseason game since 1936.

With the Buffalo Bills and Detroit Lions both Super Bowl contenders, fans north of the border are nervously hopeful a title drought could end.