DeKeyser was injured in a preseason game Sept. 30 and the prognosis was he would miss 3-4 weeks with sprained ligaments in his left foot.
"I just kind of took it as it went," DeKeyser said. "Every day it felt a little bit better, so I was able to do a little bit more and be back a little bit earlier than expected."
Helm has been sidelined since he sustained a concussion on the first day of training camp. He spoke with coach Jeff Blashill after the Red Wings held a lightly-attended optional morning skate and pronounced himself ready to face Montreal.
"We were just waiting to see how things felt [Friday] night, [Saturday] morning, and things feel good so I'm good to go," Helm said.