 In 47 games (12 starts) with the Mariners in 2008, he had a 5–3 record, a 3.42 ERA, 77 strikeouts, and 114 hits allowed in innings.In a 2009 spring training game against the Colorado Rockies, Rowland-Smith recorded two singles in two at bats.This was his first time batting against a live pitcher since he was 17 years old.