(Portland, OR)  --  The Timbers depth will be tested when they host the Houston Dynamo on Sunday in the second leg of the MLS Western Conference semifinals.  Three Portland players left the game Monday in the zero-zero tie in Houston.  Diego Chara broke a foot.  Darlington Nagbe went out with a calf injury.  Larrys Mabiala exited with a hip injury.  Plus Sebastian Blanco suffered second degree burns from spilling boiling water on himself in a cooking accident before the first playoff game.  While Chara is definitely out, the Timbers are monitoring the health and availability of the others.