Callahan, the Rangers' captain, had to leave midway through the first period after he was involved in some contact with Predators defenseman Victor Bartley in the corner of the offensive zone. After the game, a 4-1 Rangers loss, the team announced that Callahan will miss four-to-six weeks with a grade 2 MCL sprain, an injury that could also impact his potential spot on the U.S. Olympic team.
He played just 3:28 before exiting.
The Rangers have already been without Callahan two other times this season as he missed the season opener while recovering from a shoulder injury, and then missed a couple of weeks due in late October/early November to a broken thumb.
In 23 games this season Callahan has scored seven goals to go with six assists.
The Rangers entered play on Tuesday tied for the third spot in the Metropolitan Division with 31 points and are currently in the pile of mediocrity that makes up most of that divisions current playoff race.