Eichel was forced to leave midway through the opening period of Saturday’s 4-2 win over the Boston Bruins after he took an awkward fall on a check.
He fell backward as he was checked by Bruins defenseman Matt Grzelcyk along the boards behind the Bruins’ net.
Eichel, the No. 2 overall pick in the 2015 draft, leads the Sabres with 22 goals and 53 points. He missed the first 21 games of the 2016-17 season because of a sprained ankle.