Matthew Aurel Brash (born May 12, 1998) is a Canadian professional baseball pitcher for the Seattle Mariners of Major League Baseball (MLB).
Brash made his professional debut in 2019 with the Arizona League Padres and Fort Wayne TinCaps, posting a combined 1.69 ERA over 5+1⁄3 innings. Brash did not play in 2020 due to the cancellation of the Minor League Baseball season because of the COVID-19 pandemic.