Bio

Isaac Gerald Mattson (born July 14, 1995) is an American professional baseball pitcher for the Baltimore Orioles of Major League Baseball (MLB). On November 20, 2020, Mattson was added to the 40-man roster. On May 3, 2021, Mattson was promoted to the major leagues for the first time. Mattson made his major league debut on May 7, pitching 2/3 of an inning and allowing one run on a Marwin González RBI double. He was optioned to the Triple-A Norfolk Tides the following day. On June 30, Mattson was recalled by the Orioles. He recorded his first career strikeout on July 3, striking out Los Angeles Angels infielder David Fletcher.