Greenway has already made an impact early in his hockey career. The second-round pick (No. 50) of the Minnesota Wild in the 2015 NHL Draft won a gold medal for the United States at the 2014 World U-17 Hockey Challenge and 2015 IIHF World Under-18 Championships. He excelled at Boston University and played at the 2017 IIHF World Championship after his sophomore season. the 6-foot-6 forward became the first African-American player to compete for the U.S. in the Olympics at the 2018 PyeongChang Games.
Born in Canton, New York, Greenway played high school hockey at Shattuck-Saint Mary's in Minnesota before joining the USA Hockey National Team Development Program for two seasons (2013-15). As a junior at BU, he was selected to the Hockey East Third All-Star Team after earning 30 points for the second consecutive season.