That's discouraging news. But I 100% believe that it is better for both the kid and the program to redshirt him this year if he's not capable of physically holding up, to preserve two full years of eligibility than it is to waste one where he's gimping around on one leg. Plus, with Rak graduating this year, it would be nice to have DC2 back at full strength to nail down the fort for the next TWO seasons, instead of just one [especially since fellow "big" man Chris McCullough is a likely one-and-done loss, as well].
The work DaJuan has put in this offseason to lose and maintain that weight loss is AWESOME--really reflects on his strong work ethic and willpower. This kid may not have lived up to the hype thus far, but he's a former McDonald's all american who's capable of being a big contributor. I'd rather suffer the short term impact of not having him this year than risk him getting hurt a third conesecutive season.
I'm guessing that with proper time to rehab, and with all of the weight he's shedded, he'll come back much more equipped to deliver next season.
Again, that's all based on the assumption that he won't be close to 100% physically when the season kicks off. If he is close to that 100%, then obviously that changes the thought process.