Former Boston University and QMJHL forward AJ Greer was looking ready for a promising 2017-18 campaign.

His performance during the Avalanche’s somewhat-disappointing rookie showcase in August suggested that he was ready for a standout year, regardless of whether he spent the majority of his time with the AHL’s San Antonio Rampage or he managed to get a look in the NHL.

Unfortunately, it looks like that won’t happen for a while.

Adrian Dater reported on Wednesday that Greer, who has been out with concussion symptoms, will continue to sit out indefinitely for the time being.

This eliminates the likelihood that the 20-year-old winger, who put up 15 goals and 38 points in 63 games for the Rampage last year, will get to help Colorado somewhere in their system with an early hot start. That’s disappointing, particularly given how tough and energetic he was during a showcase in which the Avalanche prospects lost all of their matchups.

The good news, though, is that this gives him plenty of time to recover fully. With no estimated timetable, there’s little reason for the Avalanche to try rushing Greer back, meaning that he’ll be less likely to hurt himself more with a premature return.

The hits just keep coming, though. After the Avalanche lost fellow forward Tyson Jost to a minor issue during training camp, goaltender Jonathan Bernier is reportedly dealing with a groin tweak of his own. If Colorado is already witnessing injuries and the season hasn’t even begun, it could be a bad omen for how their year will go.

The season officially begins on October 5th.