Marion Sylvester Barber III (born June 10, 1983 in Plymouth, Minnesota) is an American football running back for the Chicago Bears of the National Football League. He was drafted by the Dallas Cowboys in the fourth round of the 2005 NFL Draft. He played college football at Minnesota.
Barber was selected to the Pro Bowl in 2007. He is the older brother of Houston Texans safety Dominique Barber and the son of former New York Jets running back Marion Barber, Jr..
Barber attended Wayzata High School located in Plymouth, Minnesota and was a standout in football, baseball and track. In football, he was a SuperPrep and PrepStar All-Midwest and consensus All-State honoree as a senior running back and as a defensive back. During his last season with the Trojans, he amassed 1,778 rushing yards with 18 touchdowns and led his team with 10 interceptions (3 of which came against Gatorade National Player of the Year and future Minnesota Twins catcher Joe Mauer). In baseball, he was an Honorable Mention All-Conference center fielder. In his first and only track season, Barber qualified for the 2001 Minnesota State Class AA Championships in the 100 meters. He finished the season with a 100m time of 10.9 seconds.