Davis was born in Atlanta, Georgia, and attended Douglass High School, where he rushed for 7,339 yards and 80 touchdowns in his career. As a senior, he ran for 2,389 yards and 28 touchdowns on 350 carries, including two games with 300+ yards. Davis has a brother Mike Davis who played for the Gamecocks. He participated in the Georgia North/South game and earned co-MVP honors as he scored the only touchdown to lead the North to victory. Davis received 5A all-state honors by the Atlanta Constitution as a senior, after being named honorable mention 5A all-state as a junior. He was also an honorable mention All-Southern team pick by the Orlando Sentinel. Considered a four-star recruit by Rivals.com, Davis was listed as the No. 6 running back prospect in the nation in the class of 2005. He chose Clemson over Alabama, Florida, Georgia, Kentucky, Louisiana State, Mississippi State, Tennessee, and Virginia Tech.
College career
Already a starter in his true freshman season at Clemson University, Davis racked up 879 rushing yards on 165 carries and scored nine rushing touchdowns, which set the Tiger single-season freshman touchdown record. He had four 100-yard rushing games, most ever by a Tiger true freshman, and ranked first among freshmen in the Atlantic Coast Conference in rushing. Davis was subsequently named ACC Rookie of the Year, the first Tiger to win the award since Anthony Simmons in 1995. He was also a second-team freshman All-American by Rivals.com and third-team by College Football News, as well as an honorable mention freshman All-American by Sporting News. In his sophomore year, Davis rushed 1,187 yards for an average of 91.3 yards per game, 28th-best in the nation and third-best in the ACC. His 17 touchdowns tied a Clemson single-season record also held by Lester Brown in 1978, and was fifth-most in ACC history. Davis was one of ten semifinalists for the Doak Walker Award in 2006, and also earned First Team All-ACC honors. Clemson's leading rusher for the third-straight year, Davis ran for 1,064 yards and 10 touchdowns on 214 attempts as a junior. He ranked second in the ACC and 53rd in the nation in rushing average per game. Davis became the first Tiger running back to be named First-Team All-ACC in consecutive years since Terry Allen. As a senior, Davis suffered separated shoulder in spring 2008 practices, and had arthroscopic surgery to repair. He failed to reach the 1,000-yard mark for a third consecutive year, as he only rushed for 751 yard and 11 touchdowns. However, he still led Clemson in rushing, becoming the first Tiger in history to do that. Davis finished his college career fourth in Tiger history in career all-purpose yards.
Davis applied for the 2008 NFL Draft in January 2008, but withdrew his name a few days before the final deadline. He was automatically eligible in the 2009 NFL Draft, but his draft stock had taken a hit after his up-and-down senior season. Consistently referred to as a "one-cut, one-speed runner", Davis was projected as a late-round pick. He was eventually selected in the sixth round by the Cleveland Browns.
Cleveland Browns
On September 12, Davis was involved in a minor one-car accident and suffered a head injury. He was briefly hospitalized and released a few hours later. Davis was projected by many pundits to be a good under-the-radar player and a fantasy sleeper, however after appearing in the season's first three games, Davis was placed on injured reserve on October 3, after allegedly being tackled by a Cleveland Browns linebacker in practice and suffering a torn labrum. It was initially reported Davis did not have shoulder pads on while the linebacker that tackled him did. However, an investigation by the NFL concluded that the injury occurred in a "controlled environment" and no league policies were violated. On October 25, 2010, he was released by the Browns.
Washington Redskins
On October 27, 2010 Davis was signed to the Washington Redskins practice squad. During the Redskins' Week 11 victory over the Tennessee Titans, back up running back, Chad Simpson, suffered a broken foot during pregame warmups, Davis was then signed to the Redskins' roster the following day, November 22, 2010. He left the squad on August 15, 2011, after reportedly being unhappy with his playing time. The following day, he was placed on reserve/left squad. He requested and was granted his release on August 21.
Houston Texans
On September 28, 2011, Davis was signed to the Houston Texans practice squad.
