Adam Loewen is a Canadian former professional baseball player who played as a pitcher and outfielder. He was born on April 9, 1984, in Surrey, British Columbia, Canada. Loewen was a highly touted prospect in high school and was selected by the Baltimore Orioles in the first round of the 2002 Major League Baseball (MLB) draft.

Loewen made his MLB debut on April 23, 2006, for the Orioles. He pitched in 35 games for the team that season, starting 29 of them. He finished the season with a 6-6 record and a 5.37 earned run average (ERA). In 2007, Loewen started the season in the Orioles' starting rotation but was sidelined with an elbow injury after just four starts. He underwent Tommy John surgery and missed the rest of the season.

Loewen returned to the Orioles in 2008 but struggled with his command and was sent down to the minor leagues. He continued to struggle with injuries and was eventually released by the Orioles in 2010. Loewen then signed with the Toronto Blue Jays and spent the next few seasons in their minor league system.

In 2015, Loewen made a comeback as an outfielder. He signed with the Philadelphia Phillies and played in their minor league system as an outfielder. He made his MLB debut as an outfielder on September 5, 2015, for the Phillies. Loewen played in 14 games for the Phillies that season, hitting .188 with one home run and four runs batted in (RBIs).

Loewen played in the minor leagues for the Arizona Diamondbacks in 2016 but was released in August of that year. He then signed with the Sugar Land Skeeters of the independent Atlantic League of Professional Baseball. Loewen played for the Skeeters for the remainder of the 2016 season and the 2017 season before retiring from professional baseball.

Overall, Loewen's baseball career was marked by injuries and setbacks. He was a highly touted prospect but was never able to live up to his potential as a pitcher. However, his comeback as an outfielder in 2015 was a testament to his perseverance and determination. Loewen's career highlights include his MLB debut in 2006 and his comeback as an outfielder in 2015.