Matthew excelled in both the 100 breaststroke and 200 individual medley while competing for the Eagle River High School program … placed second in the 100 breast and third in 200 IM at Alaska State Championships in the fall of 2021 … was the 2021 Cook Inlet Conference champion in both events … added a pair of third-place finishes in the 200 IM as a freshman and sophomore, with respective placings of fourth and third in the 100 breaststroke at the state meet … garnered top-five showings in four events, including a runner-up finish in the 50 freestyle, at the 2021 Alaska Summer Championships while competing for the Chugiak Aquatics Club