Kaczur was a Canadian and extremely raw when he entered college as Canadian kids are way behind Americans when it comes to being trained as football players. He also played Canadian high school football which is a completely different game than the American game and the adjustment to the American game is huge.
When New England drafted Kaczur, they saw a kid who had immense upside as he had only scratched the surface of his talent and was nowhere near being a finished product, hence he was a 3rd round pick which is quite an accomplishment for a Canadian player.
Greco doesn't have the upside of Kaczur, he's a decent prospect but nothing special.
And proud of it!!!