The talk surrounding Erik Karlsson’s future with the Ottawa Senators has suddenly reached a feverish pitch. The Senators don’t want to trade their captain and franchise player, but word around the National Hockey League is that they’re listening to offers and there’s no shortage of interest. With the annual trade deadline falling at 3 p.m. on Monday, Senators general manager Pierre Dorion isn’t shopping the 27-year-old Karlsson, but teams have called because his long-term future is uncertain with his contract set to expire on July 1, 2019. Listening is part of Dorion’s job even if these are offers he can easily refuse but the fact Karlsson’s name is out there means the level of activity will increase in the coming days as the deadline draws closer. As has been reported, the expectation is that any team wanting to acquire Karlsson must also commit to taking winger Bobby Ryan and his $7.25-million on the salary cap through 2021-22. That’s a big commitment in addition to a package that would include high-end prospects and first-round draft picks.