Trystan Stuart Gwyn Magnuson (born June 6, 1985) is a Canadian former professional baseball pitcher.
He was originally drafted by the Toronto Blue Jays with the 56th pick in the 2007 Major League Baseball draft from the University of Louisville. He played in the minor leagues with the Blue Jays until being traded to the Oakland Athletics along with Daniel Farquhar for Rajai Davis after the 2010 season. Magnuson made his major league debut on May 17, 2011, against the Los Angeles Angels of Anaheim. He threw 1 inning and didn't give up a run. He was traded back to Toronto for cash considerations on November 4, 2011.
Magnuson started the 2013 season with the Blue Jays' Double-A affiliate New Hampshire Fisher Cats. He was released on May 7, 2013.
He is the nephew of the late National Hockey League defenseman Keith Magnuson.
Magnuson graduated with his Master's in Engineering from Carnegie Mellon University in 2014 and now works as a mechanical engineer in the automotive industry.