While Gallagher will be in uniform on Thursday night, according to head coach Claude Julien, Byron's status is still to be determined.
He is listed as day-to-day with a lower-body injury after going down against the Dallas Stars.
Will Shaw get the call?
With Byron's playing status still up in the air, Andrew Shaw could return to the lineup against the Capitals.
The eight-year NHL veteran has been a healthy scratch for the last two games.
Admittedly, it's been tough for Shaw to watch from the sidelines.
"It's really hard. My game isn't at the level it should be. I missed a lot of games. With the speed of games night after night, I have to be at my best. I played in January, and then I played a few games after that, so I have to get my speed, my positioning and a few other things back," said the Belleville, ON native, who has suited up for 126 games with the Canadiens since joining the fold in 2016-17. "I'll be ready when the team needs me."
The fact that Shaw is experiencing timing issues is perfectly normal, according to Julien.
"We had a conversation and we were honest. He listened and he understood. At the end of the day, it isn't his fault or mine," noted Julien. "We have to work together to get him back playing his best hockey. He had a lot of major injuries, so he has to get back on track."