Breaking: Erik Karlsson reveals he played series injured

Ottawa Senators captain Erik Karlsson appeared to be battling an injury in the series against the Boston Bruins, and he still made key contributions to his team's series win. With the series now over, his injury was made known.

A hairline fracture is a painful microscopic split of the bone. The treatment is to rest and let the bone heal. Hopefully, Karlsson's foot heals in time for round 2 of the NHL playoffs. Hockey athletes are the toughest, and Karlsson is a playoff warrior.