At least 8 torn achilles tendons in the NFL since training camps opened (~1 week):
http://corner.bigblueinteractive.com...&thread=410287
By no means do I mean to vindicate CF having undertrained weekend warriors do high-rep box jumps for time (and therefore often in a depth jump style).
My guess is that the injured players didn't properly train during the lock out and so their bodies weren't ready for the full stresses of training camp...