Reiss’ PiecesPatriots rookie linebacker Tyrone McKenzie, who was injured during the team’s rookie mini-camp last weekend, is out for the season with a torn anterior cruciate ligament in his right knee, according to a source close to the rookie. The second of the team’s two third-round picks in the 2009 NFL Draft, McKenzie was injured during the first of two practice sessions last Saturday. During a one-on-one coverage drill, McKenzie became tangled up with a running back and went down.

So the Patriots make one LB acquisition so far this offseason.  A spot where they were paper thin last year and suffered their biggest loss in Mike Vrabel.  And after a week with the team, his season is over.  Which is pretty much how the last four or five years have gone for the Pats D.  Let’s do the math.  Assume a 53 man roster.  Allow for 3 guys who are exclusively Special Teamers.  That leaves 50 guys, and let’s say half of them are on defense.  At the rate of one getting knocked out for the season every ten days, that will mean that by mid October we’ll be down to just Jerod Mayo and Junior Seau’s cell number.  Which is still better than we made out last year.  Paging Jason Taylor.