Chicago Cubs pitcher Sean Marshall previews his start against the Pittsburgh Pirates on Tuesday night. Marshall (2-3, 3.96 ERA) will face off against right-hander Ian Snell, who is 1-5 with a 4.88 ERA on the year. With Rich Harden on the DL, Marshall remains in the starting lineup, but there are no guarantees in Chicago. Sarah Spain talked to Marshall about taking it one day at a time.