He was rested last week but still seems way short of been fully match fit.
I thought it a strange decision from BM to state that he intended to give the forwards a rest when possible, to then omit Burgess this week only to play him in the reserves. If we are going to rotate the props, then a rest should surely mean a week without playing a game, not turning out for the 2nd team.

So the others didn't
I would say it's more to the fact we are not playing well rather than lack of effort.