Where's this thing about McNair being injury-prone coming from? Check out this list:
P.Manning
Palmer
Brees
Brady
E.Manning
Favre
FBG currently has McNair listed as the #24 QB. Of the 23 QBs listed ahead of him, the above is the complete list of QBs who've played as many games as McNair in the past two years.
I think it's quite silly to be projecting McNair below Matt Schaub, Jason Campbell, Alex Smith, among others. Remember that McNair, last year, came to Baltimore very late, had very little time to pick up the offense, and still finished as the #17 QB overall.
I think FBG is missing the boat on this one; Baltimore was the #13 passing offense last year, and they should improve this year.