Ross Detwiler is a left-handed pitcher who has played for several Major League Baseball (MLB) teams throughout his career. He was born on March 6, 1986, in St. Louis, Missouri, and attended Missouri State University, where he played college baseball.

Detwiler was drafted by the Washington Nationals in the first round of the 2007 MLB draft and made his MLB debut in 2009. He spent the majority of his early career with the Nationals, where he was primarily used as a starting pitcher. In 2012, he had a career-best season, posting a 10-8 record with a 3.40 ERA and 105 strikeouts.

After spending seven seasons with the Nationals, Detwiler was traded to the Texas Rangers in 2015. He struggled with the Rangers, posting a 7.12 ERA in 43 innings pitched. He was then traded to the Atlanta Braves in 2016, where he made just one appearance before being released.

Detwiler then signed with the Oakland Athletics in 2016 and had a solid season, posting a 3.98 ERA in 35 appearances. He spent the next few seasons bouncing around between several teams, including the Chicago White Sox, Seattle Mariners, and Cleveland Indians.

In 2020, Detwiler signed a minor league contract with the Miami Marlins and was called up to the MLB roster in August. He made six appearances for the Marlins, posting a 1.64 ERA in 11 innings pitched.

Detwiler has primarily been used as a relief pitcher in recent years, but has also made several starts throughout his career. He has a career record of 32-53 with a 4.36 ERA and 546 strikeouts in 831 innings pitched.

Overall, Detwiler has had a solid MLB career, but has struggled with consistency at times. He has been a valuable asset to several teams throughout his career, and his versatility as both a starter and reliever has made him a valuable addition to any pitching staff.