Larry Csonka, member of '72 Dolphins, celebrates Steelers' loss

Former Miami Dolphins fullback Larry Csonka was in a celebratory mood after the Washington Football Team handed the Pittsburgh Steelers their first loss of the season Monday night.

Csonka, a member of the Dolphins team that went undefeated in 1972, tweeted a video of himself puffing on a cigar and enjoying a drink during the final minutes of the game.

"Tonight, I'm a Washington fan," the Hall of Famer said.

The '72 Dolphins went 14-0 in the regular season and won three postseason games, including a 14-7 victory over Washington in Super Bowl VII, to finish 17-0. They remain the only team in NFL history to complete an undefeated campaign.