5 regular NHL players? From one draft?
I'd like to know the last time ANY NHL team pulled that trick off. My guess is that if it's ever happened before, there were less teams involved.
2006 Maple Leafs - Tlusty, Kulemin, Reimer, Stalberg, Komarov
2009 Sens - Cowen, Silfverberg, Lehner, Wideman, Hoffman
2009 Islanders - Tavares, De Haan, Koskinen, Cizikas, Lee (and in 2008 they had 4 Bailey, Hamonic, Martin, Spurgeon)
There are some others depending on what you consider a regular as some guys played shorter careers as bottom line players then went overseas etc. But generally speaking it's very rare.
I will say I was surprised to see that several teams have regularly hit on 3 or 4 solid players for stretches, like the Ducks, Islanders and Canucks. 5 does seem like a stretch and it's very likely even if they do have 5 regulars at least a couple of them are not going to reach their potential.