Which LB's to start?

I currently have L. Fletcher, Chad Greenway & Desmond Bishop in my starting line-up.  Sean Lee and Pat Angerer are available free agents at the moment.  I can drop B. Pollard from my bench and pick up either Lee or Angerer.  

Any help would be appreciated.

Without a doubt in my mind you have to drop Pollard and pick up Sean Lee.

Would you start Lee this week over Fletcher, Greenway or Bishop?

That's a close call. I think Bishop is an every week must play on most teams.

would you start lee over pierre paul?  i basically have a defensive flex spot to fill.  thanks

well in my league I can't start a LB in a DL spot, but if you can I'm assuming I'd obv do it.