I think Green and Pearce both have higher ceilings than the DE's projected to be available at #39/#41. The questions with them are if Dennis Allen would sign off on DE's their size and the character issues.
I don't think he's saying round 3 is the best place to address the OL, he just has the other positions ranked higher on his list of needs for the Bears.
I wonder if there's any money left to spend in free agency to sign another DE, DT, OL, S, RB or whatever else that they can use to help any position that they weren't able to in the draft. There's still some really good names out there at multiple positions that can help this team.