The Twins selected Matthews' contract from Triple-A St. Paul on Tuesday. He'll start Tuesday's game against the Royals.
Matthews will make his MLB debut Tuesday against Kansas City, and if he performs well, could see additional starts due to Joe Ryan (shoulder) and Chris Paddack (forearm) being injured. The 24-year-old was exceptional at Double-A, logging a 1.95 across 55.1 innings, but he's struggled with St. Paul, posting a 5.68 ERA across four starts (19.0 innings). However, he tallied a 23:1 K:BB at Triple-A. He may be worth a look as a streamer in the future, but he carries some risk Tuesday against a solid Royals lineup.