In 1976, Fran Tarkenton threw for his 40,240th yard, breaking Johnny Unitas' NFL record for career passing yards.
In 1995, Dan Marino launched his 47,004th yard, breaking Tarkenton's mark.
In 2007, Brett Favre slung his 61,362nd yard to move ahead of Marino.
And last week, Peyton Manning reached his 71,839th yard and passed Favre in what, unfortunately, might be remembered as one of the saddest days for an NFL icon in league history.
"Football is hard," Tarkenton said this week. "Peyton breaks a record of Brett Favre's, a record I once held for [19] years. A big record. And the next thing you know, he's on the bench and people are booing him and yelling for the other guy.
"But, hey, that's football."
Indeed.
Manning was benched as the Broncos lost their second straight game, because he also was the reason they lost their second straight game. He had thrown four interceptions, extending his league-leading number to 17 during a season in which he's completing only 59.9 percent of his passes, with a career-low passer rating of 67.6.