4. Clinton Portis

Years with Broncos: 2002-2003 (2 seasons)

Broncos Stats: 3,099 rushing yards; 71 receptions; 678 receiving yards; 31 total touchdowns

Career Accolades: 2-time Pro Bowler; AP Offensive Rookie of the Year

Though Portis played just two of his nine NFL years in Denver, he rushed for a third of his career yardage and nearly half of his career touchdowns during that time. In his first season, Portis earned himself Rookie of the Year honors for rushing 1,516 yards and finding the end zone 15 times. Four of those touchdowns came in a 31-24 victory over the Kansas City Chiefs, where he set a record for the youngest player to score four touchdowns in a game.

Portis followed up his prolific rookie year with another 1,500+ yard season and another 14 touchdowns. That December, he bested himself, becoming the youngest player to score five touchdowns in a game.

Denver traded him four months later. Before you go retrograde crazy, remember that trade with the Washington Redskins brought future Hall-of-Famer Champ Bailey to the Mile High City. It is still recognized as one of the greatest and strangest trades in NFL history.