My main spec is Ret, but I spec Prot as an offspec for fun sometimes. I've mostly just gotten spare set pieces, and just ended up with lots of block value items form what our actual tanks didn't need.
Unbuffed:
Defence: 549
Dodge: 21.26%
Parry: 17.70%
Block Rating: 25.78%
Block Value: 1590
Still stuck with a crap blue pair of bracers so im at 27.9K HP unbuffed. They are unenchanted so getting either the badge/H-Raz bracers and getting them 40 stam should put me at about 28.8K unbuffed. With holy Shield up, avoidance is at about 104.1, a little over, but oh well, you get what you get when its an offspec :P