Tyrone Calico (again) and Charles Rogers (again).
These are two of my favorite sleepers, although I wouldn't exactly call them too deep. Calico could have a monster year, with Mason gone Bennett may draw the double teams leaving Calico with the starting spot to harness the talent he has. Injury held him back last year, but when he is healthy he is a nice redzone target. Rogers is a huge risk because he has missed so much time over the last two seasons, but if he ever does avoid injury he could be an absolute stud.
As for a deep sleeper, I'll go with Quentin Griffin. Everyone thinks of him as a huge bust, but in reality he only had a couple of bad games before he got injured for the rest of the year. Given the chance to start in Denver's offense he can be a stud.