Yes and that 4th down lineman would be Hughes or if they get a 5 technique as you suggest it would effect either Kyle or Marcell. So that leaves 3 linebacker spots. My point is you would need Spikes on running downs to shed blocks and sniff out the run. I think Preston could serve in that role but I think Spikes is better suited for it with Kiko and Nigel on the either side of him. I just don't think Nigel, Brown, and Kiko would be fighting for 2 spots, they'd be playing a lot and if Spikes is retained he'd serve in the same role as last season. In otherwords I don't think Mario will be a LB he'd be identified as one of the down lineman, although I do think he may be asked in certain alignments to drop back but then Hughes would be down with 3 LB's on the field.