every team has guys that play hurt every week. Other teams had games where more important players miss time. Most of the guys you are talking about are middle of the road players on most teams. Young, Ansah, Houston, Broyles, Burleson don't even start on SF or Seattle!
These are important players. Ansah and Houston start. Broyles/Burleson is slot for sure too for San Fran.
You look game by game for injuries. Detroit was the more hurt team in 7 of 9 of losses. 5 of 8 wins for GB they were the healtheir team. Detroit got screwed with injuries.