There’s quite a few people who would rather play elsewhere due to current management/coaching. Sankey was incredibly angry at ODay when he left, for example. We had a potential young quarterback, who was a homegrown hero, no less, decide not to play rather than play here. That’s without going into the debacle that was the search for an OC who would actually accept a job under the current regime.
So its not a stretch to think some linemen wanted to leave.