Greer, 22, spent time with both the Avalanche and the American Hockey League's Colorado Eagles in 2018-19. He notched two points (1g/1a) in 15 games with the Avs and tallied 44 points (19g/25a) in 54 outings with the Eagles to rank second on the team in points and tied for second in goals. Greer scored his first career NHL goal on Feb. 20 vs. Winnipeg and has registered six points (1g/5a) in 37 career NHL contests.

A second-round selection (39th overall) of the Avalanche in the 2015 NHL Draft, Greer has produced 95 points (42g/53a) in 152 career regular-season AHL games with the San Antonio Rampage and the Colorado Eagles. He's tallied three points (0g/3a) in four total AHL playoff games.

In his first professional season in 2016-17, Greer skated in 63 contests for San Antonio and ranked second on the team in goals (15) and third in points (38), earning a spot in the AHL All-Star Game. The 6-foot-3, 210-pound left wing also won the 2016-17 Yanick Dupre Memorial Award as the league's man of the year, which is annually presented to the AHL player for significant contributions to the local community and charitable organizations.

Prior to turning pro, Greer spent parts of two seasons with the Rouyn-Noranda Huskies of the Quebec Major Junior Hockey League and the NCAA's Boston University Terriers. He tallied 12 points (4g/8a) in 55 career regular-season games for Boston University, helping the Terriers earn the Hockey East championship in 2015. The Joliette, Quebec, native joined Rouyn-Noranda midway through the 2015-16 campaign, notching 27 points (16g/11a) in 33 regular-season contests and adding 22 points (12g/10a) in 20 postseason outings to help the Huskies capture the President's Cup as league champions.