Aaron Harang participant of 2013 Major League Baseball season
Seattle Mariners
On April 6, 2013, Harang was traded to the Colorado Rockies in exchange for Ramón Hernández. The Rockies designated him for assignment and on April 11 traded him to the Seattle Mariners in exchange for minor leaguer Steven Hensley. In 22 starts, he was 5–11 with a 5.76 ERA. He was designated for assignment on August 26, 2013, and released on September 1.New York Mets
Shortly after his release by the Mariners, Harang was signed to a minor league contract by the New York Mets and assigned to the AAA Las Vegas 51s. Harang joined the Mets for the last few weeks of the season and was surprisingly effective. While he was 0–1 with the Mets, he pitched to a 3.52 ERA and struck out 26 batters in 23 innings pitched. Harang became a free agent after the season.