New York Rangers captain Ryan Callahan will miss four to six weeks after spraining his left knee midway through the first period of a 4-1 loss to the Nashville Predators on Tuesday night.

Callahan left the ice seconds after initiating contact in the offensive-zone corner with Nashville defenseman Victor Bartley during his fourth shift of the night. He did not return, and the Rangers announced after the game that Callahan suffered a Grade 2 sprain of his medial collateral ligament.