The Columbus Blue Jackets announced Wednesday that they’ll be without defenseman Jan Hejda for between four and six weeks because of a sprained left knee.

Already missing from action with a bad groin is Hejda’s line mate, Mike Commodore. Commodore did skate with the team on Monday, but is not ready to return to action yet.

The Jackets are currently 4-1-0 and, with eight points, lead the Central Division heading into Wednesday night’s action.