The Tampa Bay Lightning have, in recent years, built a reputation for going "off board" a bit in the 1st round of the NHL Entry Draft.
GM Steve Yzerman lets Director of Amateur Scouting Al Murray and his team run the show, and, by looking at the results, it's safe to say Murray's board is often drastically different from those you'll see from major publications and scouting services.
That's how you end up with first round 'reaches' like Slater Koekkoek and Anthony DeAngelo, a pair of high-skill defensemen that, for various reasons, weren't expected to be selected when Tampa Bay stepped up to the podium.