The 29-year-old Vanek, a former University of Minnesota star from Austria, had four goals and nine assists in 13 games this season for Buffalo. In nine seasons with Buffalo, he had 254 goals and 243 assists in 598 games. He's in the last year of his contract.
Moulson, also 29, had six goals and three assists in 11 games this season. He has 124 goals and 109 assists in 333 games in seven seasons with the Los Angeles Kings and Islanders.