Rams are the only team in NFL history to lose a game in this fashion
via sportsdata.usatoday.com
Short excerpt below. Read at the original source.
The Los Angeles Rams were in complete control of Thursday night’s game against the Seattle Seahawks, holding a 16-point lead with under 10 minutes left in the fourth quarter. Then disaster struck, as the Seahawks returned a punt for a touchdown and found the end zone again less than 2 minutes later following a three-and-out. […]