Another tough blow for the Toronto Maple Leafs on the injury front. 

After losing forward Zach Hyman the team will now be without one of their defensemen long term. 

Head coach Sheldon Keefe gave an update on Zach Bogosian on Friday and it wasn't good. 

After having an MRI, it's been decided that Bogosian will miss at least four weeks with a shoulder injury. 

More details to come.