He attended Lindsey Wilson College from 1994 to 1995 before transferring to Florida International University where he played on the men's soccer team from 1996 to 1997.

He played only one game for Colorado, then was dealt, along with Jason Boyce, to Miami Fusion on 14 August 1998 in exchange for David Vaudreuil.

[1] Marshall would spend the next three and a half seasons in Miami, starting as a forward and eventually drifting to the midfield and then defense.

On 13 June 2007, Marshall received a red card for a tackle which broke the leg of FC Dallas forward Kenny Cooper in the 89th minute.

Marshall was named head coach of the River City Rovers of the USL Premier Development League for the 2014 season.

On September 27, 2021, Marshall was named interim head coach of FC Cincinnati's senior team for the remainder of the 2021 season following the dismissal of Jaap Stam.