Richards is kind of the only one that makes sense this week, and now that his salary isn't guaranteed for the year, he could just stay on the 53 after this week if they feel comfortable moving someone else off of the roster. I'd still think they're going to take their chances with him going up and down unless a spot truly does open via injury, but it wouldn't surprise me otherwise if he just sticks on the 53 in the next couple of weeks.
Only other thing that I could see this week is adding Adams at TE3. OL had it's struggles last week, so I wonder if they might be a little more cautious with having a blocker there that can chip in on the edge. I still think they'll lean Ricard, but just another consideration.
No one else really makes sense unless they want to see what a guy like Warrior can do on ST or something, but I don't think that's something they're worried about in week 2. Can't burn those promotions too early.