Patriots' third round pick done for season with ACL tear

Being that I think the Patriots are cheats, I find it interesting that the "developmental" players that have high ceilings, but need some refining always seem to end up on IR quickly. Yet many former players say that players on the Patriots IR list practice on a regular basis.

Not saying that this is the case with McKenzie, but isn't it kind of strange that this happens a LOT to the Patriots mid to late round draft picks? Everyone is talking about waiting for the Patriots to cut some of these rookies they drafted... will there be any good ones that don't end up on IR?