Krejci has missed Boston's last three games with a midsection injury.
"I'm not really sure yet, but I will go out there and give 100 percent and try to help the team win the game," Krejci said. "I feel pretty good. It was a good morning skate."
Bruins coach Claude Julien ruled out defenseman Adam McQuaid for Thursday night's game, but said defenseman Steven Kampfer is "likely" to return to the lineup.
McQuaid has missed two straight games with a neck injury that is being treated like a concussion. He skated Sunday, Monday, and Tuesday but did not practice with the team Wednesday and did not participate in Thursday's morning skate.
Kampfer suffered a sprained MCL during a preseason game Sept. 29 and has not yet made his season debut.
"It's been a while but I'm excited for it," Kampfer said of his return. "I'm ready to go and I feel good. I just need to go out there and play my game, keep it simple and help this team get two points."