He has put in three (3) full seasons in the AHL and, as someone who has watched him play with the BST, he has steadily improved each year. He has paid his dues and worked hard to get to the NHL. It is a nice story.
Worst case he is solid, cheap depth and brings some size and physicality. Best case, maybe he develops into a solid third-pairing type. He is cheap and not Brian Strait. He is the Isles 8th defensemen. Nobody is expecting Scott Stevens but hopefully he is a solid pro. If he can't cut it, the Isles will probably bring in someone else to fill the role.
The development of Pulock, Pelech and Mayfield allowed the Isles to trade Reinhart for Barzal and 1/2 of Beauvillier. Did I mention he is not Brian Strait? I think most fans are very realistic of the last player on the depth chart. And that last player is no longer Brian Strait. That by itself is good news.