Moss is arguably the FOURTH best reciever on the 49'ers.
We know Crabtree is the best.
Manningham was heading there, but got injured.
Davis is pretty good, but doesn't make the effort and has hands of stone...can't catch hard passes.
Ginn is certainly good enough to back up anyone.
Moss is taller than Ginn, makes no effort at all, but blocks superbly.