Like I mentioned in a couple of other threads - I know the Eagles have done nothing more than merely clinch a playoff spot(a win in Dallas and they have the NFC's #2 seed, otherwise a loss means they're just a WC team), but they DID lose their starting center, Jamaal Jackson, for the year. While the Eagles have done an excellent job shuffling their OL with all their injuries/benchings all year, this loss could be potentially huge, b/c Jackson makes all the line calls in terms of blitzes et al(and he's an outstanding run blocker to boot).
Pt I'm trying to make is that what if Manning hits his thumb on someone's helmet? What if a 300 pd lineman falls on Jeff Saturday's leg? What if a safety from the blind side rams into Reggie Wayne's ribs with his helmet? What if Dwight Freeney hits his head on someone's knee ala what happened to Brian Westbrook and ended up missing several games?
Caldwell didn't make a bad decision at all, IMHO.
BTW - they lost that Pittsburgh game b/c Cowher/Wisenhunt shocked everyone by coming out throwing, when, of course, Cowher is notorious for stubbornly playing the conservative run game.