Sean Christopher Marshall is a starter and reliever for the Chicago Cubs. He is currently supposed to be in the 4th starting spot with Rich Harden so Harden can stay healthy. He has spent his whole career with the Cubs. In 2006, Marshall went 6-9 with a 5.59 ERA in 24 games. In 2007, Marshall went 7-8 with a 3.92 ERA in 21 games. In 2008, Marshall went 3-5 with a 3.86 ERA in 34 games.