Islanders sign center who could help fill John Tavares void

Brock NelsonLou Lamoriello got his last bit of housekeeping done Monday when the Islanders president and acting general manager signed restricted free-agent center Brock Nelson to a one-year deal worth $4.25 million. The settlement avoids an arbitration hearing that was set for Aug. 3, with the Islanders having previously given the 26-year-old Nelson a qualifying offer of $3.5 million.

So that ends all of the internal negotiations that were on the slate for the Islanders in what has been a tumultuous summer. Of course, this offseason was defined by the departure of captain and franchise foundation John Tavares, who left to sign as a free agent with his hometown Maple Leafs. But that also…