Why did Trusnik get so much playing time?

[spiketex]

I thought that it was unusual for Jason Trusnik to get a lot more playing time. In some cases he played quite well and didn't seem as slow as usual. Was this a strategy to reduce the incidence of getting gashed by the run, like we have seen in recent weeks or was it because someone was injured?
I thought it seemed unusual.

 

[Hayden Fox]

Misi had a hamstring.

 

[Mustangbee]

Jelani Jenkins was hurt as well.