The NHL will go back to only one outdoor game next season.

Sources told ESPN.com on Saturday that the Heritage Classic in Canada, which made its return when Calgary hosted the event in February, won't be staged next season.

The source said the Heritage may return for the 2012-13 season, but at the very least will skip next season.

The Winter Classic remains as the only outdoor game for next season. It's expected to be held in Philadelphia although the NHL hasn't made that official yet.

Pierre LeBrun covers the NHL for ESPN.com.