Ross Emery Detwiler (born March 6, 1986) is an American professional baseball pitcher who is currently a free agent. He was drafted by the Washington Nationals in the first round of the 2007 MLB draft and made his MLB debut late that season. He has also played in MLB for the Texas Rangers, Atlanta Braves, Cleveland Indians, Oakland Athletics, Seattle Mariners, Chicago White Sox, Miami Marlins, San Diego Padres and Cincinnati Reds.