We all know Manu's injury was a big factor in last season's troubles, but don't forget about the other key to maintaining team health and success.
When Tim Kness felt well early last season, the team was very successful. In fact, Tim Duncan himself was dominant when Tim Kness felt up to par. Soon, however, Tim Kness started feeling pain and soreness. It was at this point that the team began to falter. You may also notice that Duncan's production went down in the 2nd half of the season when Tim Kness felt pain. I blame Tim Kness for this mess!