Apparently BB was pretty clear on this in an interview yesterday (very surprising) when he said that Veldheer and Schwenke were generally guys he expected to make the team. The team had 8 linemen who were worth a damn - those two, the original projected starters, plus Karras. And they were likely planning on keeping Froholdt as a developmental guy.
Those two guys retire and Andrews is lost for the year, and Froholdt himself looks like he suffered a bad injury yesterday. That left us with only 5 quality linemen. Huge opportunity for others to step up this preseason, but they all looked horrid instead, including Ferentz last night who had the best opportunity. So I was fully expecting the team's 8th lineman to come from outside the organization. Hopefully this works out.