 Three times in 2009, he threw a season-high eight innings, including a game on September 16 when he limited the Chicago White Sox to one run in a 4–1 victory.Rowland-Smith made his last start of the year for the Mariners on October 3, holding the Texas Rangers to one run over innings in a 2–1 victory.Rowland-Smith finished the season with a 5–4 record, a 3.74 ERA, 52 strikeouts, and 87 hits allowed in innings over 15 games (all starts).