Yearbook, Dec. 16: 1972 Dolphins go 14-0

Dec. 16, 1972: This year, of course, is the 40th anniversary of the first and only NFL team to go undefeated and untied throughout the entire season.

This day, meanwhile, is the 40th anniversary of another (albeit less heralded) league first -- because, thanks to a 16-0 win over the Baltimore Colts at the Orange Bowl, the Miami Dolphins became the first team to finish a 14-game regular season unbeaten.

Their regular-season mark was surpassed in 2007, when the New England Patriots went 16-0. But, as a member or two of those '72 Dolphins might tell you, only one team won every game it played in the regular season and playoffs.