Kaleta has had a history of head and neck problems.
"It's a neck injury," Buffalo coach Lindy Ruff told reporters after the game. "He was X-rayed here and they took a precaution. They took him for some further tests. I have no update."
Ruff was unable to reveal the severity of the injury and how long Kaleta could be sidelined.
In 63 games with the Sabres last season, Kaleta collected five goals and five assists for 10 points, and 116 penalty minutes.