The Sharks are reportedly entertaining calls for Havlat, who has one-year left on his contract beyond this season, and have also spoken with the New York Rangers about the 32-year-old.
Havlat recently returned from a pelvis injury and was recently scratched from the lineup.
Senators GM Bryan Murray has been looking for a second-line scorer for the last few weeks and is believed to have inquired about several other players around the league.
Havlat owns a no-movement clause, but the Sun claims he would be willing to waive it to go back to Ottawa, where he spent the first five seasons of his career after being drafted 26th overall by the club in the 1999 NHL Entry Draft.
In eight games with the Sharks so far this season, Havlat has registered one goal and one assist while playing on San Jose's third line.