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The 1972 season began well with the Dolphins winning their first four games. But in week five at home against the San Diego Chargers, starting quarterback Bob Griese went down with a broken ankle and was out for the season. Veteran quarterback Earl Morrall came into the scene, who fit so perfectly into the offense that the Dolphins didn't miss a beat. They defeated the Chargers and then reeled off nine more consecutive wins to finish with the first 14-0 regular season record in the history of the NFL.

After beating the Cleveland Browns in the division championship, the Dolphins had to face the Pittsburgh Steelers. At halftime of a close game, Shula made the decision to replace Morrall with a healthy Bob Griese. Super Bowl VII matched the unbeaten Miami Dolphins -- a team that led the entire NFL in offense and defense, while boasting the league's first ever pair of 1,000 yard runners in the same backfield -- against the Washington Redskins. Miami won 14-7, becoming the first and only undefeated champions in NFL history.

Many of coach Don Shula's undefeated 1972 Dolphins had to have offseason jobs to supplement their football salaries.