Sandlak, 20, leads the Plymouth Whalers of the Ontario Hockey League with 16 goals and 24 points in 26 games.
"Carter is a gritty, tough competitor who is having a good year for Plymouth in the Ontario Hockey League," Hurricanes vice president of hockey operations Ron Francis said in a statement announcing the signing. "He's got an edge to his game and the work ethic to be a good pro."
Weber addressed the media Friday in Nashville for the first time since being hit in the eye with a puck during a 3-0 loss to the Edmonton Oilers on Nov. 27. He said he lost vision in his right eye and it didn't begin to return until the following morning.
"[Friday] was a good day. It was good to be back out there skating with the guys and hopefully move forward going ahead this week," Weber told reporters.
Miller is due to become an unrestricted free agent after the season.
"Just exploratory, get to know each other," Miller said. "They're trying to get up to speed on the organization before making any decisions. They (LaFontaine and interim coach Ted Nolan) came into a situation where some things happened, one very recently with the [Thomas] Vanek trade. You have to pause for minute and evaluate where you are because you can't keep shedding everything. I think they're trying to figure out the guys they want to hang on to and think they can build a core around and see how it goes."
Mashinter, 25, had three shots on goal and 10 penalty minutes in six games with the Rangers this season. In 11 games with the Rangers' American Hockey League affiliate, the Hartford Wolf Pack, he had seven points and a plus-3 rating.
The Blackhawks assigned Mashinter to their AHL team, the Rockford IceHogs.
Boychuk was battling with Pacioretty for a puck along the end boards in the Montreal zone when Pacioretty checked him early in the first period.
Boychuk immediately went down and remained on all fours for several minutes while Boston medical staff attended to him before calling for help from the Montreal trainer, who then called for a stretcher to be brought out.
Boychuk was immobilized before being wheeled off the ice after a 10-minute delay. Pacioretty was assessed a minor penalty for boarding at 4:28.