The Ottawa Senators are interested in keeping Erik Karlsson in the fold.

On Sunday, Senators general manager Pierre Dorion confirmed the team has presented Karlsson with a contract extension. The superstar defenseman can become an unrestricted free agent next summer and is eligible to sign a long-term extension as of Sunday.

Related - Report: 'Action picking up' on Karlsson trade talks

While Dorion didn't share the details of the offer, he added there's no immediate timeline to seal the deal.

"(The season) starts Oct. 4," Dorion said, per Postmedia's Bruce Garrioch. "We've got lots of time."

The 28-year-old Karlsson is a two-time Norris Trophy winner, presented to the NHL's best defenseman of the year.