He was selected in the third round of the 2000 NFL draft, 88th overall, by the Minnesota Vikings where he played from 2000 to 2003 and with the San Diego Chargers in 2004.
Chapman attended Marshall University, where he rushed for over 4,000 yards and scored 61 total touchdowns.
He was MVP of the 1999 Motor City Bowl[4] and was inducted into the Marshall University Hall of Fame in 2010.
After Minnesota, Chapman signed with the San Diego Chargers in 2004 where he suffered a career ending back injury during preseason against the Indianapolis Colts.
In February 2021, Chapman was hired at Marshall as a senior analyst and director of player development under first-year head coach Charles Huff.