Sources tell TSN the Tampa Bay Lightning have officially asked veteran defenseman Dan Boyle to waive his no-trade clause.

However, Boyle has not agreed to waive and wants sufficient time to assess his options and where he believes his best fit is.

Sources say three teams remain in pursuit of Boyle with the San Jose Sharks believed to be the frontrunner and considered Tampa's first choice.

If Boyle consents, there is a possibility the trade goes down today and Lightning management is said to be pushing for that.

However, Boyle won't waive his no-trade until he's talked to the team or teams involved and is comfortable with a move.

Boyle only played 37 games this season after his wrist was cut by a skate in a freak accident, but he put up 25 points on four goals and 21 assists.

He signed a six-year, $40 million extension in February just before the trade deadline.

Boyle, who was part of Tampa Bay's Stanley Cup championship team in 2004, had a career year in 2006-2007 when he scored 20 goals with 43 assists for 63 points