The Sabres revealed the nature of Miller's injury late Sunday, a day after he was hurt. They also announced goalie Drew McIntyre had been called up from Buffalo's AHL affiliate in Rochester. McIntyre is expected to serve as backup to Jhonas Enroth on Monday night at Montreal.
Miller was hurt about 14 minutes into the first period of a 6-2 loss at Boston on Saturday night, when he left his crease to play the puck before being checked by Lucic, who was attempting to chase down a loose puck. Lucic received a minor penalty for charging.
Miller continued playing through the end of the second period, before being pulled after allowing three goals on 22 shots.
The 2010 Vezina Trophy-winner did not return to the bench for the third period, but made sure to stick around to provide expletive-laden postgame comments.
"[Lucic has] 50 pounds on me and he runs me like that? It's unbelievable," Miller said. "Everyone in this city sees him as a big tough solid player. I respected him for how hard he played. That was gutless."
Immediately after being hit, Miller used his stick to take a swipe at Lucic but missed.
Sabres coach Lindy Ruff said following the game that Miller had a sore neck.
This is the second concussion for Miller in a span of eight months. He missed four games late last season after struck in the mask by shots in back to back outings.
Miller has struggled of late, having allowed 20 goals on 148 shots in going 1-5 in his past six starts.