Curling’s Grand Slam circuit may be on its last legs.

The Asham World Curling Tour’s annual series of high-profile events was dealt a crushing blow on Wednesday when CBC Sports decided to pull the plug on the remaining broadcasts this season.

There was no official word late Wednesday on the reasoning for the CBC decision, but according to a source, it’s believed that the Grand Slam circuit, which is operated by iSport Media and Management Ltd. — a company founded by former IMG agent Kevin Albrecht in May 2009 — hasn’t followed through on its financial commitments to CBC.

Officials from the Slam and CBC weren’t available to comment late Wednesday

There’s no word on how this will affect the final two Grand Slam events of the season — the Pomeroy Inn and Suites National beginning Jan. 25 in Dawson Creek, B.C., and the GP Car and Home Players Championship, which runs April 17 to 22 in Summerside, P.E.I.

But there’s little question that losing a national broadcaster will put the Slam circuit in jeopardy, and that will have a series of major side-effects.

There’s still hope on the horizon, however. The Dawson Creek event was to mark the return of Rogers Sportsnet to curling; Sportsnet was going to show some preliminary games before turning it over to CBC for the weekend. It’s possible that Sportsnet could pick the entire weekend up to bail out.